PWM Modulation Block for Adjustable Motor Speed Slope
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Solution Overview
Problem
Conventional motor driving methods using PWM struggle to dynamically adjust motor rotation speed in response to varying operational conditions, such as CPU temperature, without requiring changes to the control system or motor components, limiting flexibility and efficiency.
Innovation Solution
A motor driving apparatus with a PWM modulation block comprising a PWM direction control circuit, a PWM vector transfer circuit, and a PWM signal generation circuit, which adjusts the PWM control signal to vary the motor rotation speed by converting the PWM signal into a vector voltage and generating a modulation signal voltage to control the motor output, allowing for flexible adjustment of motor speed based on external voltage adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the input duty cycle of the PWM is changed to adjust motor duty in response to operational conditions, then the adaptability of the motor control system is improved, but the complexity of the control system increases
Solution Approach 1:
The patent introduces a PWM modulation block as an intermediary component between the controller and the motor. This block includes a PWM direction control circuit, a PWM vector transfer circuit, and a PWM signal generation circuit that work together to modulate the PWM signal. By placing this intermediary block, the system can adjust motor duty without requiring changes to the main controller, thus improving adaptability while containing control system complexity within a dedicated module.
Solution Approach 2:
The control system is segmented into distinct functional blocks: the original controller, the PWM modulation block (further divided into direction control circuit, vector transfer circuit, and signal generation circuit), and the motor output unit. This segmentation allows the PWM modulation block to be independently adjusted and configured without affecting the entire control system, enabling adaptability improvements with localized complexity management.
2Productivity
If the wire coil of the motor is changed to increase the duty of the motor, then the motor performance is improved, but the cost and complexity of the system increases
Solution Approach 1:
Instead of changing the physical wire coil of the motor, the patent changes the electrical parameters of the PWM control signal through the PWM modulation block. By adjusting the duty cycle, frequency, and other parameters of the PWM signal electronically, the motor performance is improved without any physical modifications to the motor itself, avoiding the cost and complexity associated with motor substitutions.
Solution Approach 2:
The patent replaces the mechanical approach of changing motor components (wire coil) with an electronic control approach (PWM modulation block). The physical motor remains unchanged, while the electronic control system dynamically adjusts motor performance through signal modulation, eliminating the need for mechanical or physical modifications to the motor structure.
3Adaptability or versatility
If a PWM modulation block is added to adjust the slope of the duty of the motor, then the flexibility of the motor control is improved, but the device complexity increases
Solution Approach 1:
The PWM modulation block is designed as a universal module that can work with different motor types (signal phase motor or three-phase motor) and different control requirements. The block performs multiple functions including direction control, vector transfer, and signal generation within a single integrated structure, providing flexibility without proportionally increasing complexity.
Data Source
AI summary
A pulse width modulation (PWM) module is configured to adjust the input PWM control signal and the motor can be implemented in different rotation speed to enhance the flexibility of the implementation of the motor when the PWM control signals are the same. In addition, the PWM modulation block in the present invention includes a PWM direction control circuit, a PWM vector transfer circuit and a PWM signal generation circuit. Apparently, the PWM modulation block of the present invention is connected to a PWM control signal inputted by an external system and an external adjustment apparatus; by setting up the adjustment apparatus, the vector and the modulation direction of the PWM control signal can be adjusted, and the duty cycle of the PWM control signal can also be adjusted.