CMOS-Integrated Power Supply Module for Hall Sensorless BLDC Motors
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Solution Overview
Problem
Current power supply modules for hall sensorless brushless direct current (BLDC) motors face challenges in achieving high integration, intelligence, multi-functionality, and high efficiency due to their complex component requirements.
Innovation Solution
A CMOS-integrated power supply module that combines a high-voltage/large-current power device, a motor driving circuit, and a power device driving circuit on the same substrate, utilizing a super junction vertical or trench power device and a motor driving circuit with units for positional signal detection, PWM control, and external interface, to efficiently drive the hall sensorless BLDC motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple separate chips (power device chip, power device driving circuit chip, motor driving circuit chip) are used to constitute the power supply module, then the module can provide high voltage/large current and drive the BLDC motor, but the device complexity increases and integration is reduced
Solution Approach 1:
The patent merges the power device, power device driving circuit, and motor driving circuit onto a single chip. This integration reduces the number of separate components from three chips to one, simplifying the overall device structure while maintaining the high voltage/large current capability through careful circuit design and CMOS technology utilization.
Solution Approach 2:
The integrated chip performs multiple functions simultaneously: it acts as a high voltage/large current power device for motor driving, includes power device driving circuit for control, and incorporates motor driving circuit for position and velocity sensing. This multi-functionality eliminates the need for separate specialized components.
2Reliability
If separate chips are used for power device and driving circuits, then each component can be optimized independently, but the manufacturing cost and assembly complexity increase
Solution Approach 1:
By combining all functional components into a single integrated chip, the patent eliminates the assembly process of mounting multiple separate chips onto a board. This single-chip solution simplifies manufacturing while maintaining reliability through systematic design and testing of the integrated circuit.
3Adaptability or versatility
If a 3-chip configuration is used with separate power device, power device driving circuit, and motor driving circuit chips, then functional separation is achieved, but the intelligence and multi-functionality requirements are not met
Solution Approach 1:
The integrated chip incorporates position sensing, velocity sensing, and motor driving functions within a single device. This enables the system to adapt to various operating conditions and control modes (position control, velocity control) without requiring additional external components or complex multi-chip configurations.
Data Source
AI summary
Disclosed is a power supply module for a hall sensorless BLDC motor, including: a high-voltage/large-current power device t applied with high voltage/large current and including a plurality of power devices driving the hall sensorless brushless direct current (BLDC) motor; a motor driving circuit sensing and controlling a positional signal or a velocity signal of the hall sensorless BLDC motor and generating a PWM control signal for controlling the hall sensorless BLDC motor; and a power device driving circuit driving the high-voltage/large-current power device according to the PWM control signal of the motor driving circuit, wherein the high-voltage/large-current power device, the power device driving circuit, and the motor driving circuit are CMOS-integrated on the same substrate.