Motor Drive Control Device with Dual Circuits and Voltage Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Motor drive control devices with broken drive circuits can cause motors to reverse rotate, leading to decreased internal pressure and impaired cooling functions in devices, necessitating a solution to maintain forward rotation.
Innovation Solution
A motor drive control device with dual drive circuits and an adjustment circuit that monitors voltages and applies predetermined voltages to input and output terminals to ensure continued forward rotation, even if one drive circuit fails, using voltage blocking and reverse connection protection circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single drive circuit is used to control the motor, then the device complexity is reduced, but the reliability deteriorates because the motor cannot continue forward rotation when the drive circuit fails
Solution Approach 1:
The drive circuit is divided into two independent drive circuits (first drive circuit and second drive circuit), each capable of independently controlling the motor to rotate in the forward direction. This segmentation allows the system to maintain forward rotation capability even when one drive circuit fails, resolving the contradiction between reliability and complexity by distributing the critical function across multiple independent units.
Solution Approach 2:
The control device changes the operational parameters by applying different voltages to different terminals based on the failure state. When a drive circuit is detected to have failed, the adjustment circuit applies a predetermined voltage to specific terminals to enable the remaining functional drive circuit to continue controlling the motor in the forward direction, thus maintaining reliability through dynamic parameter adjustment.
2Reliability
If no adjustment circuit is added to monitor drive circuit status, then the device complexity is reduced, but the reliability deteriorates because reverse rotation cannot be prevented after drive circuit failure
Solution Approach 1:
The adjustment circuit incorporates a feedback mechanism by monitoring the voltages from both drive circuits and comparing them against expected operational ranges. When a voltage anomaly indicating drive circuit failure is detected, the system automatically responds by applying corrective predetermined voltages to prevent reverse rotation, thus improving reliability through continuous monitoring and automatic correction without adding complex control systems.
Solution Approach 2:
The adjustment circuit acts as an intermediary between the two drive circuits, mediating their operational states. It monitors the output voltages and intervenes by applying predetermined voltages to terminals when imbalances are detected, ensuring that the motor continues to rotate in the forward direction even when one drive circuit fails, thereby preventing reverse rotation through intermediate control.
3Ease of operation
If the motor is allowed to reverse rotate when drive circuit fails, then the ease of operation is improved (no complex protection needed), but the object-affected harmful factors increase due to decreased internal pressure and impaired cooling function
Solution Approach 1:
The system performs preliminary action by proactively detecting drive circuit failures through voltage monitoring before reverse rotation can occur. The adjustment circuit is pre-configured to apply specific predetermined voltages to terminals upon detecting failure conditions, automatically maintaining forward rotation and preventing the harmful effects of reverse rotation on cooling function without requiring external intervention or complex protection mechanisms.
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 solution effectively maintains forward rotation of motors, preventing reverse rotation and maintaining cooling function integrity by compensating for drive circuit failures with the operational drive circuit, thus ensuring continued operation and reduced production costs.
Implementation Method 1
an adjustment circuit to which a first monitor voltage output from the first drive circuit and a second monitor voltage output from the second drive circuit are input, wherein one or both of the first drive circuit and the second drive circuit has at least one of an input terminal to which a signal related to driving of the single phase motor is input and an output terminal from which a signal related to driving of the single phase motor is output, and the adjustment circuit performs an adjustment operation of applying a predetermined voltage to at least one of the input terminal and the output terminal based on the first monitor voltage and the second monitor voltage
Implementation Method 2
each of the first drive circuit and the second drive circuit further includes a voltage blocking circuit for blocking application of a back electromotive force generated in the single phase motor
Implementation Method 3
each of the first drive circuit and the second drive circuit further includes a reverse connection protection circuit for protecting a circuit when the motor drive control device is connected in reverse polarity to a power supply, and the reverse connection protection circuit includes the voltage blocking circuit
Data Source
AI summary
A motor drive control device for driving a single phase motor having a coil of a first system and a coil of a second system includes a first drive circuit configured to control energization to the coil of the first system, a second drive circuit configured to control energization to the coil of the second system, and an adjustment circuit to which a first monitor voltage output from the first drive circuit and a second monitor voltage output from the second drive circuit are input. One or both of the first and second drive circuits has at least one of an input terminal and an output terminal. The adjustment circuit performs an adjustment operation of applying a predetermined voltage to at least one of the input terminal and the output terminal based on the first and second monitor voltages.