Abstract
When a consumer chooses a product, one of the most important considerations is price. Therefore, cost reduction is the most important factor when manufacturing a product. This paper has applied the sensorless method to remove the position sensor in an interior permanent magnet synchronous motor (IPMSM) system and examined the way to reduce the use of the trigonometric function in order to lower the dependency on a high-end CPU. A sensorless method has been studied to use an extended electromotive force (EEMF) that can increase the degree of freedom of the motor in the IPMSM system. In addition, an observer is applied to the estimated position to stabilize the system. Furthermore, many trigonometric functions are used for driving the IPMSM. Since this trigonometric function requires decimal point operations, that requires a lot of computation time and a high-performance CPU. Therefore, this paper proposes a new method to pre-compensate the maximum torque per ampere (MTPA) angle as a way to reduce the use of the trigonometric functions which makes a high-spec CPU unnecessary. Simulations and experiments are conducted to verify the proposed control algorithm.
Highlights
In recent years, high-efficiency products have been preferred due to concerns over high oil prices and energy resources
This paper proposes a new method for pre-compensation of β to eliminate the nonlinear operation proposes a new method for pre-compensation of β to eliminate the nonlinear operation characteristics of interior permanent magnet synchronous motor (IPMSM), simplify the computation of algorithm, and reduce the reliance on trigonometric functions
The controller was configured using with kW, rpm, and poles and it is for an oil pump
Summary
High-efficiency products have been preferred due to concerns over high oil prices and energy resources. There is an increasing demand for higher efficiency of high-output household appliances such as robotic vacuum cleaners, fans, air conditioners, refrigerators and washing machines. The same concern applies to servo drive motors and industrial robots for factory automation systems [1,2]. Permanent Magnet (PM) machines have higher power density, higher power factor and higher efficiency per unit volume than induction motor, and have the advantage in terms of size because there is no heat due to copper loss. IPMSM can utilize electromagnetic torque (Te ) as well as reluctance torque to output higher torque. Since the IPMSM can be designed to have a smaller air gap than surface permanent magnet synchronous motor (SPMSM), the magnetic flux density is higher. IPMSM is attracting attention as the most widely used induction motor replacement motor in industry [2,3,4,5,6,7,8]
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