Motor Driver Multipurpose Pin Serial Data Frequency Generation
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Solution Overview
Problem
Existing motor driver systems require multiple pins for serial communication and mode control, leading to increased size, power consumption, and manufacturing costs, while offering limited flexibility in controlling motors.
Innovation Solution
A motor driver system utilizing a multipurpose pin for both serial data transmission and frequency generation, which enables multiple operations through a single pin, allowing for reduced size, power consumption, and manufacturing costs, and increased flexibility in motor control by determining operation modes based on received signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple pins are used for serial communication and mode control, then communication reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies multi-functionality by enabling a single pin to perform multiple roles: it can serve as a serial communication pin (receiving/transmitting data), a frequency generation output pin, and a mode control pin. The pin's function is dynamically selected based on the motor driver's operational state, allowing one pin to replace what would traditionally require multiple dedicated pins, thereby reducing device complexity while maintaining communication reliability
2Reliability
If multiple pins are used for serial communication and mode control, then communication reliability is improved, but manufacturing cost increases
Solution Approach 1:
By designing the pin to perform multiple functions (serial communication, frequency generation, mode control), the patent reduces the total pin count required on the motor driver. This reduction in pin count directly lowers manufacturing costs by simplifying the package design, reducing assembly complexity, and decreasing the overall component count, while still maintaining reliable communication through the multiplexed pin
3Device complexity
If a single multipurpose pin is used for both serial communication and frequency generation, then device complexity is reduced, but signal interference may increase
Solution Approach 1:
The patent employs periodic action by implementing time-division multiplexing where the pin alternates between different functions in distinct time periods. During motor operation, the pin outputs frequency signals; during idle periods, it performs serial communication. This periodic switching ensures that frequency generation and data communication occur at different times, preventing signal interference while maintaining device simplicity
Solution Approach 2:
The patent applies dynamics by making the pin's function changeable based on operational conditions. The control logic dynamically switches the pin between frequency output mode and serial communication mode according to the motor driver's state. This dynamic reconfiguration allows the same physical pin to adapt its electrical characteristics and function, reducing device complexity while managing potential signal conflicts through intelligent timing
Data Source
AI summary
A motor driver system. Implementations may include: a motor driver configured to couple with a motor where the motor driver comprises a multipurpose pin. A controller may be included coupled with the motor driver through at least the multipurpose pin. The motor driver during an enable mode, may be configured to receive serial data from the controller and to send serial data to the controller using the multipurpose pin during a normal operation mode of the motor driver. The motor driver may be configured to output a frequency generator (FG) signal to the controller using the multipurpose pin during the normal operation mode of the motor driver.