Motor Control IC Single Pin Lead Angle Encoding
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Solution Overview
Problem
Motor control ICs require multiple input pins to manage various control signals, leading to increased complexity and expense, as each pin occupies space and adds complexity.
Innovation Solution
A system utilizing an analog-to-digital converter (ADC) to receive a discrete analog voltage via a single integrated circuit pin, generating a digital bit value that identifies a lead angle curve's target intercept and slope, allowing the motor to operate based on this curve, with control logic decoding the digital bit value to determine the necessary motor controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple input pins are used to control motor parameters, then the motor control functionality is comprehensive, but the device complexity and expense increase
Solution Approach 1:
The patent combines multiple motor control parameters (lead angle, duty cycle, direction, thresholds) that were previously controlled by separate input pins into a single integrated control pin. The motor control IC processes a single input signal to derive multiple control parameters, thereby reducing the number of pins while maintaining comprehensive motor control functionality.
Solution Approach 2:
The single input pin is designed to serve multiple functions by encoding various motor control parameters within a single signal. The motor control IC universally processes this single input to control different facets of motor operation, making the pin multi-functional rather than requiring dedicated pins for each parameter.
2Manufacturing precision
If multiple input pins are used for motor control signals, then precise control is achieved, but the pin occupancy and cost increase
Solution Approach 1:
Multiple control signals that were previously distributed across separate pins are merged into a single input signal. The motor control IC internally processes this single signal to generate the necessary control waveforms with precise timing and parameters, maintaining control precision while reducing pin occupancy to just one pin.
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
This approach reduces the number of input pins required, simplifying the motor control system and reducing costs while maintaining effective motor operation by encoding multiple control parameters into a single digital bit value.
Implementation Method 1
an analog-to-digital converter (ADC) configured to receive a discrete analog voltage and to generate a digital bit value representing said analog voltage
Data Source
AI summary
A system, in some embodiments, comprises: an analog-to-digital converter (ADC) configured to receive a discrete analog voltage and to generate a digital bit value representing said analog voltage; control logic, coupled to the ADC, configured to identify a target intercept and a target slope for a lead angle curve based on the digital bit value; and a motor, coupled to the control logic, configured to operate based on a lead angle identified using said lead angle curve, wherein the ADC receives the analog voltage via a single integrated circuit pin.