Motor Driving Control Apparatus for Independent Not-Powered Braking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional brake devices for electric motors require a floating circuit structure, a battery, and an external power source for operation, making them complex and costly, and they cannot perform independent not-powered braking.
Innovation Solution
A motor driving control apparatus with a motor driving unit, a motor control unit, a brake control unit, an interphase short-circuiting unit, and a short-circuiting signal output unit that selectively energizes and short-circuits three-phase coils using counter electromotive force, allowing for independent not-powered braking without an external power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional brake devices use a floating circuit structure with photocouplers and batteries, then the motor can be stopped during power interruption, but the circuit structure becomes complex and requires external power sources
Solution Approach 1:
The invention extracts and eliminates the battery and floating circuit structure from the brake device. By using the motor's own counter electromotive force during power interruption, the system removes the need for separate power sources and complex isolation circuits, achieving braking functionality with a simplified structure.
Solution Approach 2:
The brake device utilizes the motor's counter electromotive force for dual purposes: during normal operation it serves as part of the motor control system, and during power interruption it automatically provides braking power. This eliminates the need for dedicated braking components and external power sources.
2Reliability
If conventional brake devices require external power sources and batteries, then braking control can be maintained, but the device cost increases
Solution Approach 1:
The brake device is designed to be self-sufficient by utilizing the motor's own counter electromotive force during power interruption. This self-service approach eliminates the need for external batteries and power sources, reducing component count and manufacturing cost while maintaining reliable braking control.
3Adaptability or versatility
If dynamic braking is performed without power supply, then independent not-powered braking is achieved, but conventional devices still require floating circuit structures and batteries
Solution Approach 1:
The invention removes the battery and floating circuit structure requirements from independent not-powered braking systems. By directly utilizing the counter electromotive force generated during power interruption, the system achieves autonomous braking without complex isolation circuits or external power sources.
Solution Approach 2:
The invention uses the counter electromotive force as an intermediary energy source that bridges the gap between power interruption and braking action. This natural electrical phenomenon generated by the motor itself serves as the mediator that enables braking without external power or complex circuitry.
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
Enables completely independent not-powered braking with a simple circuit structure, reducing costs and eliminating the need for external power or batteries, while effectively stopping motor rotation during power interruptions and suppressing forced rotation by external winds.
Implementation Method 1
By short-circuiting the motor coils, and short-circuiting the counter electromotive force generated between the motor coils, the rotation of the motor can be stopped quickly with the use of regenerative braking
Implementation Method 2
The interphase short-circuiting unit short-circuits coils in each of three pairs that are different combinations of two coils
Data Source
AI summary
A motor driving control apparatus according to an embodiment includes a motor driving unit that selectively energizes the three-phase coils of a motor; a motor control unit that switches an energizing phase of the coils in a predetermined order, the energizing phase being a phase to which the motor driving unit energizes, by outputting a driving control signal to the motor driving unit; a brake control unit that outputs a brake control signal; an interphase short-circuiting unit that is connected to the coils, and that short-circuits the coils in each of three pairs that are different combinations of two coils of the coils, in response to a short-circuiting signal; and a short-circuiting signal output unit that is connected between the interphase short-circuiting unit and the coil, and that outputs the short-circuiting signal to the interphase short-circuiting unit when an input of the brake control signal is received.