Live broadcast data collection | ST home appliance three-phase motor control solution

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Live broadcast details: ST three-phase motor control solution for home appliances

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FAQ

1. What is the main control strategy of ST household appliance motor control?
A: 1. Safety 2. High efficiency and energy saving 3. Quiet 4. Cost
2. What are the advantages of ST brushless DC (three-phase BLDC) motors and what are the typical application areas?
A: 1. Ecosystem 2. Multiple patented algorithms 3. Rich product portfolio 4. Strong support team
3. What is the general power of the motor drive of a household drum washing machine? What are their control characteristics?
A: 300~700w, high speed, heavy load start
4. Is there no free Keil for the F1 series?
A: 30k code is free
5. What is the industrial operating temperature range of STSPIN32F0?
A: -40 to +125 °C
6. What language is the ST software control reference code in? What is the development environment?
A: C language, Keil, IAR, STM32CubeIDE can all support
7. How should the boost circuit around the driver chip be added?
A: The datasheet will have detailed instructions, please refer to the datasheet
8. What kind of control algorithm is generally implemented in the microcontroller that controls the inverter?
A: FOC
9. Does the three-phase induction motor use a vector driver or something else? Does the transistor used in the controller control the gate driver? What method is used in the sensorless motor driver application to detect the normal operation of the load motor ?
A: FOC drive, power devices can have different choices, and can be judged by detecting speed fluctuations.
10. Inverters are currently used in household appliances. Is SV control better or vector control better?
A: FOC is injection current
. 11. Can you give me the link to buy the beginner development board?
A: https://www.st.com/content/st_com/en/products/ecosystems/stm32-open-development-environment/stm32-nucleo-expansion-boards/stm32-ode-move-actuate-hw/x-nucleo-ihm07m1.html
12. Does ST make all the solutions for motor drive into a guided web page or PDF (with hyperlinks that can jump to the corresponding page) for customers to choose from as a design reference or option guide? If so, where is the address?
A: https://www.st.com/en/solutions-reference-designs/industrial-motor-control-solutions.html Some solutions made by our MC team have not been published online. You are welcome to consult us through agent channels or directly with our company.
13. What is the difference between IAD and HFI applications? How to determine the type of fan?
A: IAD can only work when the motor is stationary or at very low speed and has not started working. HFI can run at rest and low speed, including when the motor is already working.
14. How to control the sudden movement of the motor when starting at a very low speed?
A: PI parameter adjustment
15. Does the STM32 motor library support automatic PID parameter adjustment?
A: ST MotorControl Workbench will automatically calculate the current loop parameters according to the motor parameters
16. Automatic washing machine, automatic cleaning, dehydration, drying and disinfection, does ST have a mature solution?
A: ST currently provides motor control solutions, which do not include other control logic.
17. Under the current blockade of foreign chip technology, how does ST guarantee the supply cycle and price?
A: ST is a European company and is not affected by the US ban. In fact, many companies have turned to cooperate with our company.
18. What operating systems does the software development kit support?
A: Windows and Linux
19. Is the connection of the three-phase motor Y-type connection or star connection?
A: Y-type is star type
20. Is there any corresponding optimization for ST's motor library for high-power and micro-power FOC control?
A: The standard motor library is for more general situations. Our AE team will make corresponding optimizations for different applications. Welcome to communicate.
21. Can HFI be used for SPM?
A: No.
22. Can ST's FOC algorithm be used on other platforms? Is there a charge?
A: No.
23. Can ST's motor development software measure the number of pole pairs of brushless motors?
A: No24
. Is the parameter adaptation algorithm based on artificial neural network learning?
A: No25
. How is the energy saving of the solution? Are there any detailed power consumption indicators
? A: Different solutions and different device combinations have different indicators26
. Does ST make motors? Don’t they only make semiconductors?
A: No, they don’t make motors27
. The compressor is ON for 15s and STOP for 3s, which is not the actual working condition?
A: Test the starting performance28
. The three-phase induction motor vector drive is used to control the torque and speed of the three-phase AC motor, which means measuring the motor current. What is ST’s specific solution?
A: Single resistor, dual resistor, and current sensor sampling are all supported29
. What power devices are used for the drive control of three-phase motors in ST household appliances? Are there MOSFET/GaN/SiC/IGBT?
A: All are supported30
. Doesn’t that mean that every household appliance needs to buy an inverter?
A: Yes
31. Is there a big difference in the software library support between the G4 series and the F4 series? Or what are the advantages of the G4 series in motor drive compared to the F4 series?
A: Compare the parameters.
32. Are three-phase motors mainly used in household appliances? Are they widely used in the industrial control field?
A: Many. Inovance is also our customer.
33. What operations should be done when the brushless motor is stalled? Thank you
A: Send the stall information to the MCU
34. The motor is always stalled, and the power consumption is on the driver chip. How to deal with it to protect the life of the driver chip?
A: When a stall occurs, the power consumption will be on all current paths, including power devices, motor windings, etc. Safety and life can be ensured through proper processing of software and hardware.
35. Is the comparison between ST's overall solution and its competitors made when the MCU and IPM are different?
A: It depends on the situation. Some are comparing devices, and some are comparing solutions.
36. What is the necessity of using three-phase for household motors? What is the core competitiveness of ST's product compared with other similar products? Thank you.
A: High efficiency, high performance, quietness, and low cost
. 37. What is the application prospect of this solution? Is it applicable to countries around the world?
A: Make corresponding adjustments according to different national standards.
38. At maximum power, what is the efficiency?
A: According to the specific application, device model, etc., the efficiency of the control board is generally above 94%.
39. Is the original code
of the motor algorithm open source? A: The public version is partially open source, and the fully open source version requires application.
40. Are all the routines and source codes open to the public?
A: The public version is partially open source, and the fully open source version requires application.
41. What are the main reference factors when selecting?
A: Power, voltage, frequency, size, etc.
42. What are the effects on the circuit when the motor rotates? Do you need to add any protection? Is there any electromagnetic interference?
A: The switching of power devices will cause certain electromagnetic interference, which needs to meet EMC requirements. Generally, PCB layout and wiring need to be considered.
43. What is the basic power of household three-phase motors? Is ST's three-phase motor control algorithm packaged?
A: The power generally ranges from tens of watts to several kilowatts. It will be introduced in the following content. Please pay attention to the training content.
44. The fluctuation is too large during AD sampling. Is there a good way?
A: Pay attention to the layout and increase software and hardware filtering
. 45. How is position detection implemented in ST's motor control algorithm?
A: Observer
46. Are there any reference materials?
A: There are a lot of materials on the official website for reference. Please visit www.st.com
47. What is the market demand or technological progress for ST? In this main promotion of household appliance three-phase motor control solutions,
A: The national standard requirements for the efficiency of household appliances have been increasing, and FOC control has become the mainstream of household appliance motor control.
48. Which major household appliance manufacturers have adopted ST's household appliance three-phase motor control solutions? What kinds of appliances are they used on?
A: Hisense, TCL and other major home appliance manufacturers have used our solutions, including washing machines, refrigerators, etc.
49. Is ST's three-phase motor control solution for home appliances a complete development solution?
A: Welcome to try ST MotorControl Workbench
50. Does ST have a corresponding motor control algorithm library? How to use it and select the relevant control algorithm?
A: Welcome to try ST MotorControl Workbench
51. What are the application characteristics of the STM32 development ecosystem? What are the models and functions of the commonly used development boards?
A: Welcome to try ST MotorControl Workbench
52. Do electrical appliances with energy consumption levels above level 2 not conform to the concept of green energy saving?
A: The smaller the level
, the more energy-saving 53. Is the temperature rise and power consumption of the sampling resistor a common problem point for sampling in the three-phase motor drive?
A: The power of home appliances is generally not high. If it is not an extreme case, there will generally be no problem
54. Is there any relevant solution for the energy collection of the back electromotive force during braking?
A: Household appliances generally do not have a large inertia, and the back EMF energy is not large, so there is no point in collecting it. The usual energy feedback includes parallel DC bus and inverter back to the grid.
55. What is the difference between the motor control of household appliances and the motor control of industrial products?
A: The general drive and motor parameters of household appliances are fixed, and they can be optimized specifically for specific motors. However, the same software for general industrial frequency conversion needs to deal with different motor parameters, power levels, variable carriers, and even different speed sensor types. It is relatively complicated, but the core algorithm is the same.
56. Does ST have an interface program or chip for the resolver?
A: Resolvers are generally not used in household appliances, and there are currently no related chips.
57. When the motor drive uses a sine wave drive, how to detect the three-phase phase current? Do you need an external position sensor? /
A: The current can be sampled through a shunt resistor or a Hall current sensor. However, the position sensor is not necessary and depends on the specific application.
58. Is there only HAL library and no standard library support?
A: HAL library and LL library are optional.
59. Can the MCSDK FOC algorithm be downloaded from the official website?
A: Yes
. 60. Can I call for support for problems encountered during the development process?
A: Yes
. 61. Can this solution be applied to high-speed vacuum cleaners?
A: Yes.
62. Can the three-phase motor solution mentioned above also be applied to new energy vehicles?
A: Yes
. 63. In order to improve the motor to operate at the best efficiency, how to adjust the stator flux and rotor phase in the BLDC vector controller? Can the parameters be simulated with the software kit?
A: Yes
. 64. The motor drive current increases instantly. Can the driver chip implement a fast protection code?
A: Yes, refer to the MCUBreakin function
. 65. Can ST's three-phase motor control solution for home appliances meet the safety requirements of home appliances? In terms of safety testing, what technical improvements has ST adopted? What rectifications can technical support assist?
A: Yes, mainly from hardware and software aspects
. 66. Can HFI be added continuously when the motor rotates at low speed for a long time?
A: Yes, it depends on the tolerance to noise and thermal design.
67. In addition to high-frequency injection, are there any other methods for non-inductive variable load starting?
A: You can try open-loop IF starting. High-frequency injection requires the salient polarity of the motor.
68. Does ST's motor kit P-NUCLEO-IHM001 have to use a 12V power supply?
A: It can be up to 45V
. 69. Does the IAD algorithm require a salient pole motor? Can ordinary surface-mount motors be applied?
A: Saturated salient polarity can be used
. 70. Is the sampling of the three-phase current a fully differential circuit?
A: It can be fully differential
. 71. Does ST's PWM control module integrate DAC overcurrent protection?
A: By setting the output of DAC, the overcurrent protection function can be realized with internal or external comparator.
72. Can the ST motor solution be used for dual motor control?
A: It can be used for dual motor control. Thank you.
73. Can IAD get the source code?
A: You can contact our company or contact the agent.
74. Do these motor driver ICs have corresponding DEMO boards for learning reference?
A: You can check on the official website or contact the agent
. 75. Does IAD support surface-mount motors?
A: Yes, using the saturation salient pole rate.
76. Are there three-phase air-conditioning motors for home use? How to invert a single-phase power supply into a three-phase power supply?
A: Air-conditioning compressor motors are generally three-phase. The household single-phase power supply is converted into a three-phase variable frequency power supply to drive the compressor through an inverter.
77. Just provide a control circuit board based on STM32? Can you customize the algorithm and embed your own algorithm?
A: Both aspects are available. You can embed your own algorithm.
78. Does ST have products with integrated MCU and MOSFET drivers?
A: Not yet
79. How to deal with overmodulation in ST motor control solution? Is it related to bus voltage Udc? It seems that I don’t see Udc
in ST motor library A: At present, our algorithm adopts table lookup algorithm for overmodulation, which uses Udc
80. Can ST motor control be used for BLDC direct drive on drum washing machine?
A: Yes
81. Can you share some cases on power tools?
A: Please contact the agent
82. Can ST high-frequency injection support surface-mount motors?
A: It depends on the salient pole rate of the motor, which needs to meet certain requirements. Refer to SDK help document
83. How is the speed regulation performance?
A: It depends on the setting of loop parameters, switching frequency and other factors
84. What is the maximum drive power?
A: It depends on the rated power of the specific application
85. When demoboard measures motor parameters, what is the maximum load of the motor?
A: It depends on the power of the power board used
86. What type of control chip MCU is generally used for household appliances?
A: It depends on the complexity of the application scenario. If it is just a simple speed control, STM32G0 is generally enough. STSPIN32F0 is also a very good device with integrated MCU and driver.
87. If the motor leaks, will the MCU automatically judge and warn?
A: If it is a three-resistance sampling, it can be judged by whether the sum of the three-phase current is zero.
88. Does the STM32 development kit have a built-in control algorithm?
A: The software is provided on the website. Welcome to try ST MotorControl Workbench
89. It is very troublesome to apply for the use of three-phase electricity in households. Is there a solution for single-phase motor control? I don’t think three-phase motor control is used for home use!
A: Three-phase motors do not require the input of the driver to be three-phase.
90. There is no three-phase electricity in the home. How to solve the problem of using three-phase motors in household appliances?
A: Three-phase means that the motor has a three-phase winding. The input of the inverter can be single-phase, which is converted into a three-phase power supply to the three-phase winding of the motor through inversion.
91. What types of motors are suitable for ST's motor solution this time? What types of motors are not supported yet?
A: Three-phase permanent magnet synchronous motor and AC induction motor
92. Regarding the frequency conversion control of air conditioners, can you tell me the specific frequency conversion parameters? Are there any advantages in reducing power consumption?
A: The compressor using permanent magnet synchronous motor has high efficiency and is currently the mainstream. ST can provide the corresponding control algorithm and can use MTPA to improve efficiency. Using ST's power devices can reduce power consumption and have high efficiency.
93. Are the sample programs for three-phase household motor drive, conduction control, and vector control open source on the official website?
A: There is an introduction in the video
94. Is PI control generally used for motor speed control?
A: Yes
95. After the motor parameter self-identification function is identified, can these parameters be seen on the PC?
A: Yes
96. Has it been used in the products of famous domestic and foreign home appliance manufacturers ?
A: Yes
97. Is the motor control board of the air conditioner outdoor unit placed outdoors or in the indoor unit? What kind of temperature environment requirements do the components of ST's home appliance three-phase motor control solution need to meet in order to be used in the global version of the air conditioner outdoor unit motor control? What is the minimum starting temperature? Can it meet the ambient temperature of the Russian Far East or Northeast China?
A: The control panel of the outdoor unit is usually placed inside the outdoor unit, close to the compressor and the outdoor fan. The temperature environment has different levels, and the corresponding level of components needs to be selected to meet the needs. The minimum starting temperature can be solved by some functional solutions, such as heating the compressor before starting.
98. Is ICS sampling still needed for high-speed control?
A: Dual resistors can achieve a speed of 100,000 revolutions
. 99. How is the noise of the three-phase motor solution? Can the noise be reduced when the voice wake-up solution is applied ?
A: Increase the switching frequency.
100. Does the ST3-phase motor control solution have a braking function?
A: In order to save costs, there is generally no independent brake pipe in home appliances, and lower bridge braking is generally used .
101. Is the hardware development board debugging interface of the development kit a Jtag interface?
A: Most of our development boards have integrated ST-LINK, which only requires a USB cable. The current mainstream debugging port is generally SWD because it occupies fewer IO ports.
102. Does the parameter setting in the solution have a good human interface?
A: Our MotorControl Workbench is a very convenient and powerful tool. Welcome to try it.
103. How to deal with current acquisition?
A: Our control solution supports single resistor sampling, dual (triple) resistor sampling, and current sensor sampling. The specific algorithm can be seen in the motor library (open source), and the help document of MotorControl Workbench also has a detailed introduction.
104. I tried several vacuum cleaner solutions, but they didn’t work.
A: We have a team optimizing the vacuum cleaner solution. Welcome to visit us for guidance.
105. For hollow cups, which are used in industrial tightening equipment with high speed and require high torque control accuracy and fast response, are there any better application cases?
A: We have a dedicated power tool team to support such applications. Welcome to consult.
106. In the future, the development direction of cars seems to be to give priority to hybrid mode. What kind of solutions does ST provide?
A: We have a dedicated electric vehicle support team, welcome to consult
107. Your company only provides MCU, not peripheral circuits?
A: Our company can provide a complete solution, MCU, integrated driver, power device, op amp, etc.
108. Are there any ready-made integrated systems to choose from, including software and hardware?
A: Our company has many open source reference designs, see the website introduction
109. Three-phase is rarely used for home use, right? Discuss whether there is an application market for three-phase motors?
A: Nowadays, high-end home appliances are generally controlled by three-phase AC motor FOC, such as air conditioners, refrigerators, washing machines, etc.
110. Does the control board of the air conditioner outdoor unit need to be waterproofed? If so, how should the heat dissipation design be considered?
A: Generally, waterproofing is required, such as applying moisture-proof oil. It does not affect the heat dissipation of power devices. Heat dissipation is generally achieved by directly contacting the heat sink of the power device.
111. Will the motor control library be updated in a timely manner?
A: It has been updated
. 112. Which one is more suitable for motor control, STM32F3 series or G4 series?
A: It has been answered by voice.
113. For the motor stall protection required by safety regulations, is there any introduction to the algorithm implemented by ST software library?
A: The application function needs to be implemented by the user.
114. Are there any cases related to motor energy-saving integrated control? For example, variable frequency control, dynamic tracking adjustment of loads, etc.
A: Yes
. 115. Is the fft algorithm provided?
A: Yes, this part is provided by CMSIS.
116. Does ST have a motor control solution suitable for automobiles? If so, please introduce it.
A: Yes, another department is responsible, please contact the agent or automotive electronics department.
117. Does ST have a complete solution for permanent magnet motor control system ?
A: Yes, please contact the agent.
118. Does ST have a control solution for DC motors such as hollow cup motors?
A: Yes, please contact the agent
. 119. Is there no evaluation board available for testing?
A: Yes, please contact the agent.
120. Does ST have a solution for variable frequency compressor of air conditioner? Can it be downloaded from the official website?
A: Yes. Please refer to the relevant information of STEVAL-CTM010V1. The demo supports compressor control and fan control, and also has PFC function.
121. Does MCSDK have a demo video?
A: Yes. Please refer to the relevant link on the official website
122. What parameters of motors does the P-NUCLEO-IHM001 kit support? How to choose the available motors when the motor is not built-in?
A: There is Motor Profiler software that can automatically test the motor parameters, and our algorithm is not very sensitive to the motor parameters, so it is almost enough.
123. Does the three-phase motor chip integrate MOS or does it need to configure MOSFET externally? What is the maximum drive current?
A: There are integrated MCU and drive circuits, and there are also IPMs
. 124. What motor power control is supported?
A: There is no specific power limit in MCSDK
. 125. Today, for home appliances, we hope to reduce the size of electrical appliances, only in this way will it be favored. Now, what are the characteristics and advantages of ST's three-phase motors in this regard? (13390897556)
A: In terms of motor control, reducing the size is an important direction, in addition to the impact of PCB layout, improving the integration of components is an important direction. ST has a large number of products to choose from in this regard. For example, STSPIN integrates MCU and driver, IPM integrates driver and power device
126. Does ST's PWM control module integrate a digitally adjustable overcurrent protection function similar to TIC2000?
A: This function is available in devices with more powerful functions and built-in DAC and comparator
127. Is there any simulation software to download?
A: Download it on the official website
128. Which home appliances have high requirements for the control range of motor speed? What solutions does ST provide?
A: Juicer, hair dryer, optimized control algorithm
129. I would like to ask if electric screwdrivers belong to home appliance control. Recently, I made a hollow cup tightening solution. The maximum speed was set at 20,000 rpm at the beginning. There are strict requirements for its torque. I wonder if there is any solution in this regard
A: This belongs to the application of power tools. We also have solutions in this regard
130. What is the speed?
A: This is determined by the frequency of the carrier wave, which can reach 200,000 rpm.
131. Does the FOC start and stop require acceleration and deceleration control? Or can it be started directly at the highest frequency?
A: This is related to the design of dynamic response. Generally, it is not started directly at the highest speed.
132. Can this sensorless algorithm support secondary development?
A: Yes.
133. What are the requirements for the accuracy of the sampled current? Do they all require a 16-bit high-precision ADC?
A: 12 bits are enough for mainstream applications.
134. Does ST need isolation for three-phase motor control of household appliances? If isolation is required, is it magnetic isolation or capacitive isolation? What are the advantages and disadvantages?
A: It mainly depends on the specific application. Generally speaking, for simple motor control, thermal ground design can be done without isolation. However, if it is an interface that the user contacts, isolation must be considered to ensure human safety.
135. What are the highest and lowest speeds of the ST motor control solution? How many pole pairs are there?
A: The lowest speed is generally related to the sensor type, parameter adjustment, and motor parameters. There is no absolute value, while the high speed mainly depends on the chip's computing speed and the power device's limitation on the switching frequency.