-
My ToshibaSemicon
- 網站首頁 檢視
-
半導體 檢視
-
應用
Body Electronics
xEV
In-Vehicle Infotainment
Advanced Driver-Assistance Systems (ADAS)
Chassis
Infrastructure
BEMS/HEMS
Factory Automation
Commercial Equipment
IoT Equipment
Healthcare
Wearable Device
Mobile
Computer Peripherals
-
產品
-
開發/設計支援
-
技術知識
- 購買管道 檢視
-
- 儲存產品 檢視
- 公司資訊 檢視
- 型號查詢
- 交叉搜尋
- 關鍵字搜尋
- 參數搜尋
- 線上庫存查詢跟購買
This webpage doesn't work with Internet Explorer. Please use the latest version of Google Chrome, Microsoft Edge, Mozilla Firefox or Safari.
型號需要超過三個文字以上
The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
型號需要超過三個文字以上
What is the maximum rotation speed that a sine wave drive motor driver IC can support?
The maximum speed of a motor is mainly determined by its characteristics and the power supply voltage. However, it is also affected by the carrier frequency of the PWM control, which is set by the IC. For sinusoidal PWM drive, the recommended maximum rotation speed is about 1/100 or less of the PWM frequency.
For example, using the TC78B041FNG to drive a 4-pole motor (which consists of two pole pairs of N and S poles),
When the motor rotates at 5,000 rpm, the sinusoidal drive frequency is as follows,
5,000 rpm x 2 pole pairs / 60 seconds = 167 Hz
When the PWM carrier frequency the TC78B041FNG is set to 18 kHz,
it results in a resolution of 108 PWM pulses per sinusoidal drive cycle (18kHz / 167Hz = 108).
On the other hand, if the motor rotates at 15,000 rpm, the sinusoidal drive frequency is as follows
15,000 rpm x 2 pole pairs / 60 seconds = 500 Hz
The resolution will be 36 PWM pulses per sinusoidal drive cycle (18 kHz/500 Hz=36).
With this resolution, each PWM will xxx about 10° phase difference.
The recommended resolution is 100 or higher PWM pulses per sinusoidal drive cycle. However, motors may still rotate at resolutions under 100. In such cases, waveform distortion or noise may occur. Since it depends on the characteristics of the motor, please confirm whether the required rotation performance can be obtained with the actual motor.
Related Links
The following documents also contain related information.
