Motor Controller Backup Flyback Shutdown at High Bus Voltage
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Solution Overview
Problem
The reliability of flyback conversion circuits in motor control systems is compromised due to poor performance of power switching transistors under high input voltages, particularly in backup power supplies.
Innovation Solution
A motor controller that dynamically controls the operating status of the flyback conversion circuit based on the bus voltage, using a power supply control circuit to manage the flyback conversion circuit's operation by comparing bus voltages with predefined thresholds, thereby optimizing its status and reducing power consumption and risk of damage in high-voltage environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flyback conversion circuit is controlled to stop operating under high bus voltage, then the power switching transistor reliability is improved, but the backup power supply readiness may be compromised
Solution Approach 1:
The patent implements a feedback control mechanism where the bus voltage detection circuit continuously monitors voltage levels and provides feedback to the control circuit. Based on this feedback, the system automatically adjusts the flyback conversion circuit operation, ensuring backup power readiness when voltage is normal while protecting the transistor when voltage is high
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the reliability and extends the service life of the power switching transistor in the flyback conversion circuit by dynamically adjusting its operation in response to varying bus voltages, ensuring reliable performance even under high-voltage conditions.
Implementation Method 1
The flyback conversion circuit is configured to: receive bus voltages at two ends of the switching bridge arm, convert the bus voltages, and supply power to the safety state control circuit
Data Source
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AI summary
This application provides a motor controller. The motor controller includes a power supply control circuit, a safety state control circuit, and switching bridge aims. The power supply control circuit is configured to control a backup power supply to supply power to the safety state control circuit. The backup power supply includes a flyback conversion circuit. The power supply control circuit is configured to: in response to that a main power supply operates normally and a bus voltage is greater than a first preset voltage, control the flyback conversion circuit to stop operating. This application further provides a powertrain. Therefore, the motor controller and the powertrain provided in this application can improve reliability of the flyback conversion circuit.