Motor Emulator Control for Low Switching Loss and Current Tracking
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Solution Overview
Problem
Conventional motor emulators suffer from high switching losses due to operating at frequencies significantly higher than motor drivers, leading to inefficiencies and increased power consumption.
Innovation Solution
A motor emulator and control method that adjusts the electrical potential at its output end based on changes in input potential and current, using a control level circuit to synchronize switching frequencies with the motor driver, reducing switching losses by operating at the same frequency as the motor driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor emulator operates at a switching frequency five to ten times higher than the motor driver, then the current control becomes easier, but the switching loss increases significantly
Solution Approach 1:
The patent changes the switching frequency parameter from five to ten times higher than the motor driver to the same frequency as the motor driver, thereby reducing switching loss while maintaining current control capability through coordinated control of multiple switches
2Loss of energy
If the motor emulator operates at the same switching frequency as the motor driver, then the switching loss is reduced, but the current control becomes more difficult
Solution Approach 1:
The patent merges the control of multiple switches (first switch, second switch, third switch) under a unified control strategy that coordinates their operation based on the same switching frequency as the motor driver, enabling both loss reduction and effective current control through combined switch operation
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
The method reduces switching losses and improves current control accuracy by synchronizing switching frequencies, allowing the motor emulator to operate efficiently without additional signals from the motor driver.
Implementation Method 1
a power level circuit at least includes an inductor, and an input end of the inductor is configured to receive the electrical potential signal of the motor driver
Data Source
AI summary
A motor emulator is configured to receive an electrical potential signal from a motor driver. The motor emulator includes control level circuit and power level circuit. The power level circuit at least includes an inductor, and an inverter circuit configured to provide an electrical potential to an output end of the inductor. The control level circuit is configured to generate a trigger signal based on an electrical potential change at an input end of the inductor and a current value passing through the inductor to trigger an electrical potential change provided by the inverter circuit to the output end of the inductor, so that the electrical potential at the output end of the inductor follows the electrical potential change at an input end of the inductor to adjust the current through the inductor. The motor emulator reduces switching loss.