Integrated Driving Module Anti-Phase PWM Signal Generation
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Solution Overview
Problem
The existing power supply devices with bridge diodes in PFC circuits suffer from inefficiencies and require additional circuitry for galvanic isolated drivers, leading to increased manufacturing costs and potential noise interference.
Innovation Solution
An integrated driving module with an oscillator, PWM unit, soft start controller, and drivers that generate anti-phase PWM signals, eliminating the need for extra circuitry and output ports on the controller board, thereby simplifying the design and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an extra circuit is added to connect the controller board to the driver module to receive PWM signals, then the driving capability is improved, but the noise susceptibility increases and manufacturing cost increases
Solution Approach 1:
The patent merges the PWM signal generation function into the driver module itself. The oscillator and PWM unit are integrated directly into the driver module, eliminating the need for separate PWM signal transmission circuits between the controller board and driver module. This integration resolves the contradiction by maintaining driving capability while eliminating the noise-susceptible extra circuits.
2Ease of operation
If an extra output layout is added on the controller board to output PWM signals, then the signal transmission is enabled, but the controller board space is occupied and manufacturing cost increases
Solution Approach 1:
The patent extracts the PWM signal generation function from the controller board and relocates it to the driver module. The oscillator and PWM unit are now part of the driver module, so the controller board no longer requires extra output layouts for PWM signals. This resolves the contradiction by enabling signal transmission functionality while simplifying the controller board layout.
3Measurement precision
If a high end DSP is used to provide PWM signals, then the signal quality is improved, but the manufacturing cost increases
Solution Approach 1:
The driver module performs self-service by generating its own PWM signals through the integrated oscillator and PWM unit. The driver module no longer relies on external high-end DSP chips from the controller board to provide PWM signals. This resolves the contradiction by maintaining signal quality while reducing manufacturing costs through functional integration.
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 integrated module provides efficient galvanic isolated power without extra circuitry, reducing noise interference and manufacturing costs while maintaining high performance.
Implementation Method 1
The transformer transforms the alternative signal into two galvanic isolated power sources MOS1, MOS2
Data Source
AI summary
An integrated driving module includes an oscillator, a PWM unit, a soft start controller, a first driver, and a second driver. The oscillator is connected to a voltage input end and generates an oscillating signal. The PWM unit receives the oscillating signal and generates a first driving control signal and a second driving control signal that are respectively anti-phased. The first driver outputs a first driving output signal to a first output end according to the first driving control signal. The second driver outputs the second driving output signal to a second output end according to the second driving control signal. The integrated driving module only has four connection ends for external connection to provide the two anti-phase driving output signals, such that the circuit design and connection of the primary side of the transformer is greatly simplified. The design limitation and manufacturing cost can be both lowered.