Voltage Conditioner Block for Single-Phase Induction Motor Noise Filtering
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Solution Overview
Problem
Existing control systems for single-phase induction motors are vulnerable to noise and transients in the mains, leading to potential damage and high costs due to the direct connection of electronic control circuits to the mains, with existing solutions failing to provide effective interference avoidance.
Innovation Solution
A control system comprising a voltage conditioner block and an electronic control circuit, where the voltage conditioner block is connected in parallel to the auxiliary switch, allowing it to accumulate energy and supply power to the control circuit independently of the mains, thereby filtering noise and transients through the inductive behavior of the motor windings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic control circuit is directly connected to the mains to provide electrical power, then the control circuit can operate continuously, but it becomes vulnerable to noise and transients in the mains causing potential damage
Solution Approach 1:
The voltage conditioner block serves as an intermediary between the mains and the electronic control circuit. It conditions the power by filtering noise and transients while providing stable voltage to the control circuit, thus protecting it from harmful electrical disturbances without requiring direct connection to the mains
Solution Approach 2:
The power supply system is segmented into separate functional blocks: the voltage conditioner block handles power conditioning and noise filtering, while the electronic control circuit handles control functions. This segmentation allows each block to be optimized independently, with the voltage conditioner protecting the control circuit from mains interference
2Reliability
If filters or suppressors are installed to protect the electronic control circuit from noise and transients, then the control circuit reliability improves, but the cost and installation space increase
Solution Approach 1:
The voltage conditioner block merges multiple protective functions (noise filtering, transient suppression, voltage regulation) into a single integrated circuit. This consolidation provides comprehensive protection for the control circuit without requiring multiple separate filtering devices, thereby reducing overall system complexity and installation space
Solution Approach 2:
The voltage conditioner block performs multiple functions simultaneously: it conditions voltage, filters noise, suppresses transients, and provides power to the control circuit. This multi-functionality eliminates the need for separate dedicated filtering and protection devices, reducing system complexity
3Reliability
If voltage stabilizers are used to protect against mains variations, then the control circuit is protected from voltage fluctuations, but the cost increases further
Solution Approach 1:
Voltage stabilization, noise filtering, and transient suppression functions are merged into the single voltage conditioner block. This integration achieves comprehensive voltage protection without requiring separate voltage stabilizer equipment, thereby controlling manufacturing costs
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 solution enhances the reliability and reduces costs by eliminating the need for additional filtering devices, as the voltage conditioner block and auxiliary winding effectively filter noise and transients, ensuring stable operation of the single-phase induction motor.
Implementation Method 1
the voltage conditioner block being capable of accumulating electrical energy when the auxiliary switch is turned off, the voltage conditioner block being arranged to supply electrical power greater than a minimum electrical voltage value to the electronic control circuit
Implementation Method 2
filtering noise and transients through the inductive behavior of the motor windings
Data Source
AI summary
A control system for a single-phase induction motor including at least: one electronic control, a main switch, an auxiliary switch, one voltage conditioner block, the main switch being electrically associated to the main winding and the auxiliary switch to the auxiliary winding, the control circuit being electrically associated to the voltage conditioner block and to the switches, the switches being turned on or off by the control circuit, the control system and the motor being electrically associable to an alternating voltage source, the conditioner block is associated in parallel to the auxiliary switch, the conditioner block being capable of accumulating energy when the auxiliary switch is turned off, the conditioner block being arranged to supply electrical power greater than a minimum value to the control circuit, for at least a start-up time, by way of the energy accumulated in the conditioner block, when the switches are turned on.