Bi-power Motor Control Apparatus Decoupling Power Sources

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Solution Overview

Problem

Conventional motor controlling apparatuses have limited control over rotational speed and generate noise due to shared power sources for the driver IC and motor, restricting adjustable speed ranges and modulating capabilities.

Innovation Solution

A bi-power motor controlling apparatus with a driver IC receiving separate power sources, where one power source is used to control the motor's rotational speed by adjusting a triangle-wave power signal, and another for the driver IC, minimizing noise interference during pole commutation by phase-commutation sensing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the driver IC and motor share the same power source, then the device complexity is reduced, but the controllable rotational speed range is limited and noise cannot be modulated

Engineering Contradiction:

Improvecontrollable rotational speed rangeVSAvoidpower source configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The power source is segmented into two independent parts: a first power source connected to the motor and a second power source connected to the driver IC. This segmentation allows independent control of motor power and driver IC power, enabling the motor's rotational speed to be adjusted over a wider range without being constrained by the driver IC's power limitations, thus resolving the contradiction between adaptability and device complexity.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If the driver IC and motor use the same power source, then the device structure is simplified, but electronic noise during pole commutation cannot be minimized

Engineering Contradiction:

Improveelectronic noise during pole commutationVSAvoidpower source configuration

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

By segmenting the power source into separate first and second power sources for the motor and driver IC respectively, the patent isolates the electronic noise generated during pole commutation to the motor's power circuit. This prevents noise from coupling into the driver IC's signal circuits, effectively reducing electronic noise interference while maintaining reasonable device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful electronic noise is extracted and isolated by providing the motor with a dedicated first power source separate from the driver IC's second power source. This extraction removes the noise source from the driver IC's power domain, preventing noise from affecting the driver IC's operation and reducing overall system electromagnetic interference.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8531142B2Bi-power motor controlling apparatus

Publication Date: 2013.09.10 DELTA ELECTRONICS INC(CN)

AI summary

A bi-power motor controlling apparatus, which is electrically connected with a motor, includes a driver IC having a first pin and a second pin. The first and second pins are used to receive a first power and a second power, respectively, from outside. The second power is supplied to the driver IC, and the first power is supplied to the motor for controlling the rotational speed of the motor.