-
My ToshibaSemicon
- General Top View
-
SEMICONDUCTOR View
-
Applications
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
-
Products
Products
-
Design & Development
Design & Development
Innovation Centre
At the Toshiba Innovation Centre we constantly strive to inspire you with our technologies and solutions. Discover how to place us at the heart of your innovations.
-
Knowledge
Knowledge
Highlighted Topics
Further Materials
Other
- Where To Buy View
-
- STORAGE View
- COMPANY View
- Part Number Search
- Cross Reference Search
- Keyword Search
- Parametric Search
- Stock Check & Purchase
This webpage doesn't work with Internet Explorer. Please use the latest version of Google Chrome, Microsoft Edge, Mozilla Firefox or Safari.
require 3 characters or more.
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.
require 3 characters or more.
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.
