Electric motor and method of use
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Solution Overview
Problem
Typical motor control assemblies in electric motors for HVAC appliances are large, impeding airflow and increasing operational and maintenance costs due to their size and bulky components, which reduce efficiency.
Innovation Solution
A modular-packaged control system is introduced, separating the control system into two discrete housings: one for the inverter module located on the electric motor and another for the power supply module, which is remote, using wireless communication to control the motor and reduce wired connections, thereby minimizing airflow impedance and enabling separate replacement of modules based on failure rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a motor control assembly is integrated with the electric motor, then control functionality is achieved, but the assembly size increases and impedes airflow
Solution Approach 1:
The motor control assembly is segmented into separate functional modules: the inverter module remains integrated with the motor while the power supply module is separated and positioned remotely. This segmentation allows the motor control functionality to be maintained while reducing the volume of the integrated assembly, thereby minimizing airflow impedance.
Solution Approach 2:
The power supply module is extracted from the integrated motor control assembly and positioned in a remote location within the HVAC housing. This extraction removes bulky components from the motor area, reducing the overall assembly size and improving airflow characteristics while maintaining full control functionality through wireless communication.
2Adaptability or versatility
If a large motor control assembly is used, then all control components are integrated, but operational and maintenance costs increase
Solution Approach 1:
The control system is divided into modular components with the power supply module separated from the inverter module. This segmentation enables independent replacement of failed modules, reducing maintenance costs by avoiding complete assembly replacement and allowing technicians to replace only the specific module that has failed.
Solution Approach 2:
The modular design allows failed modules to be individually replaced rather than replacing the entire control assembly. The separated power supply module can be independently serviced or replaced, extending the lifecycle of functional components and reducing overall maintenance expenditures.
3Volume of moving object
If the power supply module is located remotely, then airflow impedance is reduced, but wired connections increase
Solution Approach 1:
Wireless communication technology is used to replace physical wired connections between the remotely positioned power supply module and the control system. This substitution maintains the airflow benefits of remote positioning while eliminating the complexity of additional wiring, using electromagnetic fields instead of mechanical electrical connections.
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 solution reduces the size of the motor control assembly, improves efficiency by minimizing airflow impedance, lowers operational and maintenance costs, and allows for separate replacement of modules, enhancing EMI and thermal performance.
Implementation Method 1
The inverter module is configured to convert the DC voltage to an AC voltage to operate the electric motor
Implementation Method 2
The power supply module is configured to convert an input AC voltage to a DC voltage
Data Source
AI summary
A motor control assembly for an electric motor. The motor control assembly is configured to be coupled to the electric motor, and includes a wireless communication module, an input power connector, and an inverter module. The wireless communication module is configured to receive a wireless signal from a system controller. The input power connector is configured to receive a DC voltage from an external power supply module. The inverter module is coupled to the wireless communication module and the input power connector. The inverter module is configured to convert the DC voltage to an AC voltage to operate the electric motor according to the wireless signal.