Due to the growing needs for energy saving and quiet motor operation, brushless DC (BLDC) motors are widely used for various applications.
To improve the motor drive efficiency, a complicated process is generally required. Toshiba offers motor drive controllers that solve this problem.
A brushless motor controller with integrated pre-driver that can drive a wide range of external MOSFETs to meet the challenges of applications across a wide range of power levels. The TC78B027FTG incorporates Toshiba's Intelligent Phase Control technology and closed-loop speed control for optimum operating efficiency in a wide variety of applications including high-velocity server fans, blowers and pumps.
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3-phase Brushless Motor Drivers
1-phase Brushless Motor Drivers
To optimize motor efficiency, the lead angle must be adjusted using actual equipment although it is controlled based on the information on rotor positions from Hall sensors.
The lead angle must also be adjusted according to the motor constants, rpm and other factors even when a motor controller/driver has an auto lead angle control function. Therefore, there has been a need for an improved control method that reduces burdens on users.
Intelligent Phase Control detects the motor current phase and feeds back the information for auto lead angle control. When a motor application has a sensor, the phase of the Hall signal is automatically adjusted to match that of the motor drive current.
High efficiency is achieved regardless of the rpm, load torque and power supply voltage of a motor. Intelligent Phase Control also helps reduce the number of external parts necessary for lead angle adjustment.
|Motor Efficiency||Ease of Programming||Support for Various Types of Motors||Part Count||Drawback|
|Fixed lead angle control||Poor||Poor||Poor||Moderate||Changes in the rpm of a motor make the adjustment point shift, making it impossible to achieve optimal efficiency.
Lead angle must be adjusted for each type of motor.
|Auto lead angle control using conventional technology||Moderate||Moderate||Moderate||Poor|
|Intelligent Phase Control||Excellent||Excellent||Excellent||Excellent||-|
* PSpice is a registered trademark of Cadence Design Systems, Inc.