DC Motor Phase Switching Control via Dynamic Current Detection
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Solution Overview
Problem
Traditional DC motor phase switching technologies fail to effectively control current during phase transitions, leading to mechanical noise and reduced efficiency due to residual current in the coil, affecting the motor's operation.
Innovation Solution
A control apparatus comprising a phase detector, current detector, and control circuit that dynamically adjusts the timing sequence of driving signals based on current detection values at the coil during phase switching, ensuring zero current at each timing point to prevent noise and enhance rotation speed and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional phase switching control is used in DC motor, then the structure is simple and ease of manufacture is good, but residual current during phase switching causes mechanical noise and reduced efficiency
Solution Approach 1:
The control circuit detects the current value at the timing point of phase switching before the switching occurs, and adjusts the switching timing based on this detection. This preliminary detection and adjustment prevents residual current from causing mechanical noise, resolving the contradiction between simplicity and noise reduction.
Solution Approach 2:
The control apparatus uses current detection feedback to monitor the current value during phase switching and dynamically adjusts the switching timing based on this feedback information. This closed-loop control eliminates residual current effects while maintaining reasonable system complexity.
2Productivity
If traditional phase switching control is used in DC motor, then the control circuit is simple, but the rotation speed and efficiency are reduced due to residual current
Solution Approach 1:
The control circuit performs current detection at the timing point of phase switching before the actual switching occurs, and pre-adjusts the switching timing based on this detection. This preliminary action ensures optimal switching timing that maximizes rotation speed and efficiency while preventing residual current issues.
Solution Approach 2:
The control apparatus dynamically adjusts the phase switching timing based on real-time current detection values rather than using fixed timing. This dynamic adjustment optimizes motor performance and rotation speed while the added complexity is minimal, involving only timing adjustment based on detected current values.
3Object-affected harmful factors
If phase switching timing is not adjusted dynamically, then the control is simple, but residual current affects motor operation and increases mechanical noise
Solution Approach 1:
The control circuit detects current at the timing point of phase switching before switching occurs, and adjusts the switching timing based on this preliminary detection. This ensures that switching happens at the optimal moment when current is minimized, reducing mechanical noise while maintaining efficient timing.
Solution Approach 2:
The control apparatus changes the phase switching timing parameter dynamically based on detected current values. By adjusting the timing parameter according to actual current conditions rather than using fixed timing, the system reduces mechanical noise while optimizing the timing precision for motor operation.
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 reduces motor vibration noise and increases rotation speed and efficiency by ensuring successful phase switching without residual current, thereby improving the overall performance of the DC motor.
Implementation Method 1
The phase detector is configured to detect the 2 M pole areas when switching phase
Implementation Method 2
The current detector is configured to detect one coil of the DC motor based on at least one timing point of phase switching in the standard phase signal
Implementation Method 3
a DC motor 12, wherein a rotor of the DC motor is divided into 2 M pole areas for phase switching
Data Source
AI summary
Disclosed are a control apparatus for dynamically adjusting a phase switching of a DC motor and a method thereof. A rotor in the DC motor is divided into 2 M pole areas, wherein M is a positive integer not less than 1. The control apparatus comprises a phase detector, a current detector, a control circuit and a driving circuit. The phase detector detects the phase switching state of the pole areas to generate a standard phase signal. The current detector detects a current flowing through the DC motor in one of switching points of the standard phase signal to generate a current detection value. The control circuit periodically outputs 2 M drive signals, and determines to perform dynamically adjusting operation on the timing sequence of the drive signals according to the current detection value. The driving circuit receives the drive signals to perform the phase switching for driving the DC motor.