Limited time replay of January seminar | Winners list included
Limited time replay
On January 31, 2024, the online seminar "From 0 to 1, taking you to understand the motor and its drive" received everyone's support. Thank you again for your enthusiastic participation! For those who missed participating in this live broadcast, you can click below to view the replay.
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In addition, Mr. Rom has selected some representative questions from the seminar to share with you here for your review.
ask
What are the main differences between brushed DC motors and brushless DC motors?
answer
Brushed DC motors have physical brushes and commutators, while brushless motors have electronic commutation.
ask
How long is the interval required for forward/reverse switching?
answer
In order to avoid direct connection of the upper and lower tubes, it is best to add an intermediate state when switching forward and reverse. The time can refer to the opening and closing time of the internal MOS tube.
ask
What are the advantages and disadvantages of stepper motors that are too subdivided? How to choose?
answer
When the subdivision number is larger, the distance traveled by each pulse decreases, the current fluctuations are smaller, and the vibration and noise are smaller. While ensuring speed, a larger number of subdivisions can be used to reduce vibration and noise.
ask
Motor control, how to reduce EMC?
answer
EMC issues are very complex and can be paid attention to from PCBLayout, the layout of input and output capacitors, inductors and resistors, etc.
ask
Are there any measures to suppress the starting current of the motor to reduce the impact on the power supply?
answer
The starting current can be reduced through the soft-start function or the current limiting function.
ask
If a brushless motor uses a Hall switch to detect the position of the coil, the consistency of the Hall switch and the coil will be different. How to ensure that the Hall switch matched with each motor can accurately detect the position of the coil? Do they all need calibration?
answer
Different brushless motors have different installation locations of the Hall. Regarding deviation, some chips have lead angle adjustment to improve efficiency as much as possible.
ask
What protection measures does ROHM onboard motor driver support?
answer
In addition to the common overheating, overcurrent, overvoltage and undervoltage protection functions, adjacent pin short circuit protection is added, and the stepper motor driver adds Stall Detection, OPEN Detection, etc.
Consult or purchase products
Scan the QR code and fill in relevant information
A staff member will contact you
Next is the announcement of the winners!
Come and see who the lucky winner is~
(The following is the user’s WeChat nickname)
Participate in interactive gift
Xiaomi 55WGaN charger
--, Da La Mao, Da Tianjin, Zhang Jiantao, Xiao Shu, Big Eyelids and Double Eyes, Geng Geng, Xin Yi, Yang San, wang, vie-king, Da Lao Grasshopper, None, FantasyFan, Chen Peng
Promotional gift
Computer stand
Indifference is not born, Jiashuo, I am super lucky????, middle-aged people, Mac Wenwen, Fengwen Changkong, TOM Sino-Japanese Innovation, Javen Zhiwen, a drop in the ocean (Sweeping Monk), Yang Guang, Gaoshan Yangzhi, Piggy Nizi, liota, Pokémon, By myself, Yan Chen, Guo Rui, Sissy, Pikachu, broken peace
Xiaomi table lamp
Geoffrey, Yitrons special-shaped plug-in machine Hanwha SMT machine Wang Yinpeng, lovely day, ai, wyf, Jiao Jun, CHASE, Chen Wenyuan, Orange, ZSP, Xiaoyue, Maomao Cat, #A0 CN.SZ LONGLAT AI*+, Xiao Joy, ^Zhong Xinghui^
Please leave a message below "nickname + name + gift name + phone number + mailing address" before 12 noon on February 28, 2024 to claim the prize. We will send you gifts after the holiday~
1. Please note that if you want to get the above gifts, you need to follow the "Roma WeChat official account"!
2. Please feel free to fill in the form. The personal information you fill in the message is only visible to the backend staff.
3. Each fan has only one chance to win, and multiple accounts are not allowed to participate in the event.
4. The final interpretation right of the event belongs to ROHM Semiconductor Group.
END
Click to read the original text to view the meeting replay
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