Infineon Motor Kit EVAL-IMOTION2GO Study Notes 1

我的学号

Infineon Motor Kit EVAL-IMOTION2GO Study Notes 1 [Copy link]

I received the Infineon motor kit from the forum last year. As usual, the first post is about unpacking and analyzing the circuit.

The package arrived in a metal box the size of a business card box. I carefully checked the label and saw the word SAMPLES. I felt that this kit was prepared to verify Infineon's own motor control IC and IDE. The official document also emphasized that this kit is only for learning demonstration and is not recommended for direct use in home appliances or light industrial applications.

After opening the cover, there is a small and exquisite board. Compared with the description in the document, it seems that there is a screwdriver missing for adjusting the speed?

The following is an analysis of the composition of the board based on official documents:

1. The board basically consists of a USB interface, a DC-DC converter, an IMC controller, an IPM module and a BLDC three-phase motor

The correspondence with the real object is as follows:

1. Power supply

The kit obtains 5V voltage from USB, and then increases it to 15V through the SOT-23 packaged BOOT boost chip MIC2250-1YD5-TR to supply the back-end control IC and driver IC.

The presence of the diode ensures that the bus current flows in one direction. The structure without large capacitors is estimated to be unable to drive heavy loads and recover energy.

Since the power supply comes from the USB port of the PC, the current is limited; the average phase current of the driven motor is only 50mA; if you want to do some load tests later, you need to pay attention to

2. Onboard download regulator

The 3v3 voltage is converted by a 1117 to XMC4200, which converts the USB signal from the PC into RXD/TXD and ICM communication; the TCK TMS leads to the board to be used as a downloader

LED3 indicates that the OBS power supply is normal

3. Control module

The control IC used is IMC101T-T038, which is a low-voltage three-phase brushless motor controller in TSSOP-38 package from Infineon, with an operating voltage of 3v3 to 5V and an output current of 50mA;

Support single resistor or three resistor low voltage end sampling, support Hall sensor signal, support boost or totem PFC control, support UART, PWM or analog input host control, support non-sensing control

And the subject of this review, Infineon's Motor Control Engine (MCE)

The relevant schematic diagram on the board is as follows:

PIN1, PIN38: Hall signal is not led out, and the PIN of TSSOP-38 is suspended

PIN2 VDC: Bus voltage sampling input

PIN6 IU: Use single resistor sampling, three resistor sampling mode is not brought out

PIN11~PIN16: Three-phase bridge control signal, support 5-20Khz PWM signal

PIN17 LED: Status light indication

PIN18 GK: Gate drive protection signal input

PIN22 23 24 27 PAR0~PAR3: parameter table selection, no lead

PIN28 DIR: No output, no function

PIN29, PIN30, PIN32, TSSOP-38 This PIN is left floating; (A small question, can LED2 connected to PIN29 work?)

PIN31 DUTYPR: Duty cycle/frequency input, no lead

PIN35 VSP: Analog speed reference signal input

PIN33 PIN34: Only use UART0 serial port, UART1 has no lead

Just some information on the manual:

Two on-chip clock sources, high-speed 96Mhz and low-speed 32.75Hhz

Chip clock unknown, RAM capacity unknown, FLASH capacity unknown

4. Power module

The power module is also Infineon's own IC, IRSM836-015MA in PQFN-36 package, with a maximum operating voltage of 500V, an output current of up to 1A, and half-bridge mode drive

C19 C20 C21, bootstrap capacitor

PIN5 FAULT: error output signal; when low voltage protection or ITRIP overcurrent occurs, this PIN will output low level; its reset time is determined by the external RC network, and it becomes high impedance after reset

The hardware design is to connect the EN and FAULT signals directly. When FAULT is low, the enable is turned off and the PMW output is turned off.

ITRIP overcurrent will also shut down the PWM output, the maximum overcurrent voltage is 0.55V (doubtful)

5. Onboard three-phase motor

According to the silk screen information, the parameters are as follows:

8 pole pairs, 6.2 ohm resistance, Lq0.58mh, Ld0.52mH, back EMF constant 0.21 V/KRPM

This concludes the hardware chapter. The next chapter will start the software record
and attach the official website link: https://www.infineon.com/cms/cn/product/evaluation-boards/eval-imotion2go/

Attached is the usage document description: Infineon-EVAL-iMOTION2GO-UserManual-v01_01-EN.pdf (1.22 MB, downloads: 5)

2023-1-8 20:41 上传

点击文件名下载附件

lugl4313820

Can this motor reach 10,000 revolutions? Will it fly out of the earth?

qwqwqw2088

The power module's drive motor power is also OK.

Half-bridge mode drive, maximum operating voltage 500V, output current up to 1A

秦天qintian0303

The on-chip clock can reach a high speed of 96Mhz, which is a bit high. Generally, it is only 40M

我的学号

lugl4313820 posted on 2023-1-9 09:16 Can this motor run for tens of thousands of revolutions? Will it fly out of the earth?

There is a 15V bus voltage there, it cannot fly out of the earth.

我的学号

qwqwqw2088 posted on 2023-1-9 09:29 The power module can also drive the motor with a half-bridge mode drive, with a maximum operating voltage of 500V and an output current of up to 1A

I think the IPM module is really powerful, but the current and voltage that the front end can get are too small due to the circuit design, so this kit can only be used for simple play.

我的学号

Qintianqintian0303 posted on 2023-1-9 09:44 The on-chip clock can reach a high speed of 96Mhz, which is a bit high. Generally, it is only 40M

This is the description of the IMC101TT038XUMA1 specification, page 5. The module block diagram is as above

lugl4313820

My student number was posted on 2023-1-9 14:10 There is a 15V bus voltage there, it can't fly out of the earth