Motor Control Circuit Phase Synchronization for Fast Activation
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Solution Overview
Problem
Existing motor driving control devices using single-sensor methods for motor activation face challenges in quickly positioning the rotor, leading to prolonged motor activation times due to the need for rotor-locking and synchronization of energization phases with position signals.
Innovation Solution
A motor driving control device and method that utilize a control circuit unit to adjust and synchronize the energization phase of motor coils based on a position signal from a single sensor, allowing for rapid phase matching and activation by switching the energization phase in a predetermined order, shortening the switching period as needed, and stopping when synchronization is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rotor-lock control operation is performed to position the rotor at a predetermined position before activation, then the motor can be driven by single-sensor method, but it takes time to complete the positioning operation
Solution Approach 1:
The control circuit unit performs preliminary actions by quickly switching the energization phase in a predetermined order during activation to preliminarily align the energization phase with the position signal phase, thereby reducing the time required for rotor positioning and enabling faster motor activation
Solution Approach 2:
The control circuit unit dynamically adjusts the energization phase during activation by quickly switching phases in predetermined order based on the position signal, making the system adaptable and reducing activation time compared to static rotor-lock methods
2Speed
If the energization phase is switched in a predetermined order during activation, then the variation timing of position signal phase and energization phase can be matched quickly, but the control complexity increases
Solution Approach 1:
The control circuit unit employs periodic action by switching the energization phase in a predetermined periodic order during activation, which systematically aligns the energization phase with the position signal phase variation timing, achieving fast phase matching through structured periodic switching
Solution Approach 2:
The control circuit unit uses feedback from the position signal to detect the rotor position and adjusts the energization phase switching timing accordingly, creating a closed-loop control system that automatically matches phases without requiring complex external control 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
Enables quick motor activation without the need for rotor-locking, reducing activation time and minimizing electromagnetic noise, ensuring quiet and efficient motor operation.
Implementation Method 1
a position detector for outputting a position signal corresponding to a position of a rotor of the motor
Implementation Method 2
a motor driving unit for selectively energizing coils of a plurality of phases of a motor
Data Source
AI summary
There is provided a motor driving control device and a motor driving control method capable of quickly activating a motor. The motor driving control device comprises a motor driving unit, a control circuit unit and a position detector. The motor driving unit selectively energizes coils Lu, Lv, Lw of a plurality of phases of the motor. The control circuit unit outputs a driving control signal C1 to the motor driving unit to switch, in a predetermined order, an energization phase of the coils Lu, Lv, Lw of the plurality of phases to be energized by the motor driving unit. The position detector outputs a position signal corresponding to a position of a rotor of the motor. The control circuit unit adjusts the energization phase based on the position signal when the motor is activated, thereby matching variation timing of a phase of the position signal and the energization phase with each other, and outputs the driving control signal C1 according to a period of the position signal after the activation of the motor.