Motor Controller Load Current Restriction for External Charging Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Noise is generated during external charging control due to the output of load current from a switching power supply in rotating electrical machines, which can affect other electrical loads.
Innovation Solution
A control apparatus that includes a switching power supply and a restriction unit to restrict control functions when external charging or power feeding modes are initiated, reducing the load current and thereby minimizing noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control functions operate continuously using load current from switching power supply, then control reliability is maintained, but electrical noise is generated affecting other loads
Solution Approach 1:
The control functions are operated periodically rather than continuously. The controller determines whether to operate control functions based on the operational state (charging/discharging vs. idle), suspending non-essential control functions during idle periods to reduce noise while maintaining reliability when needed.
Solution Approach 2:
The patent extracts and separates essential control functions from non-essential ones. During charging/discharging operations, all control functions operate normally. During idle periods, only essential functions are maintained while non-essential functions are suspended, removing the noise-generating elements while preserving critical control capabilities.
2Object-generated harmful factors
If switching power supply operates intermittently to reduce noise, then electrical noise is reduced, but control function availability decreases
Solution Approach 1:
The control system dynamically adjusts the operation of control functions based on real-time operational conditions. The controller continuously monitors the charging/discharging state and adaptively enables or suspends control functions, ensuring optimal balance between noise reduction and control availability without fixed limitations.
Solution Approach 2:
The controller preliminarily determines the operational state (charging, discharging, or idle) before deciding which control functions to activate. This preliminary assessment allows the system to proactively configure the appropriate level of control function availability, preventing noise generation while ensuring control readiness is maintained in advance.
Data Source
AI summary
A control apparatus includes an energy storage device, an inverter connected to the energy storage device, and a rotating electrical machine equipped with armature windings connected to the inverter. The control apparatus includes a switching power supply equipped with a switch and works to control a switching operation thereof to output a load current. The control apparatus is configured to use the load current to perform a plurality of control functions to control an operation of the machine. The apparatus also includes a restriction unit which performs a restriction task to restrict at least one of the control functions in response to a determination that an external charging control mode is entered which electrically charges the energy storage device using an external power supply or that an external power feeding control mode is entered which feeds electrical energy from the energy storage device to an external power receiving target.