How Three-Phase Motor Control Works with BridgeSwitch ICs
Bldc Software Library software#
The new code is MISRA C-compliant (Motor Industry Software Reliability Association), portable, modular and allows the user to modify any of the software layers. The high degree of current accuracy ensures low jitter operation. The current modeling algorithm is robust and reliable and has passed extensive static and dynamic test conditions, including low latency response to real-time events. It can also be ported to other equivalent MCUs. The code runs on any Arm ® Cortex ®-M0 at 48 MHz and does not require a hardware accelerator block. It allows real-time adjustment of motor speed and torque via the Motor-Expert graphical user interface (GUI). Power Integrations’ new software adds three-phase FOC to the existing library of single-phase code. This eliminates the need for costly and inefficient external current sense resistors, op-amps and matching circuitry and the associated complexity.” “Our BridgeSwitch integrated half-bridge ICs provide lossless current feedback for the positive half cycle, and our three-phase FOC software reconstructs the negative half-cycle current information from data present in the other phase current signals. “Traditional three-shunt field-oriented control (FOC) solutions require expensive and bulky operational amplifiers (op-amps) and matching circuity for motor-current signal conditioning,” states Cristian Ionescu-Catrina, senior product marketing manager for Power Integrations. Image provided courtesy of Power Integrations.
Power Integrations’ Motor-Expert™ Suite for BridgeSwitch™ IC family includes new control software for three-phase BLDC motor drives.
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