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Performance Comparison For 4 Kind of Driving Motor



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A detailed explanation of the causes of excessive three-phase motor current

When the motor current is high, it is often reflected in the serious heating of the motor. The following seven points basically summarize the reasons for the excessive current of the motor. Let's learn about them. Ⅰ. power supply problem In terms of power supply, the motor may overheat for the following reasons: 1, the power supply voltage is too high When the power supply voltage is too high, the electromotive force, flux and flux density of the motor increase accordingly. Since the size of iron loss is proportional to the square of magnetic flux density, the iron loss increases, leading to overheating of the core. The increase of magnetic flux leads to the sharp increase of excitation current component, resulting in the increase of copper loss of stator windings and overheating of windings. Therefore, when the power supply voltage exceeds the motor's rated voltage, the motor will overheat. 2. Too low power supply voltage When the power supply voltage is...
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New energy electric/hybrid vehicle driving motor development trend

01. Development trend of new energy vehicle driving motor type 1.1 ac induction motor At present, a variety of pure electric and hybrid new energy vehicles on the market, permanent magnet synchronous motor accounted for the majority, induction motor accounted for a small part, these two kinds of motor is basically all the electric passenger car drive motor. Compared with permanent magnet synchronous motor, ac induction motor is larger, but the price is moderate, and the induction motor can do a lot of power and there is no demagnetization problem. 1.2 permanent magnet synchronous motor For small and medium-sized electric vehicles with high requirements on space layout size, permanent magnet synchronous motor with higher power and torque density is the preferred choice. Moreover, synchronous motor is more suitable for frequent start and stop conditions and suitable for the application scenarios of urban commuting. This is one of the reasons for Tesla Model 3 to use synchronou...
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The main performance requirements of electric vehicle driving motor

(1) high torque density and power density, small size and light weight (2) high efficiency in the whole operation range (3) low speed and large torque characteristics and constant power characteristics in a wide range. In order to meet the requirements of starting, accelerating, driving, decelerating and braking power and torque, it should have a large starting torque and a wide range of speed regulation performance. Should have the automatic speed regulation function, reduces the control intensity, enhances the comfortability, achieves the internal combustion engine automobile same control response. (4)  high reliability, large overload capacity.  (5) high voltage. The main advantages are that it can reduce the size of the motor, reduce the cost of the inverter and improve the energy conversion efficiency. (6) high safety of electrical system. (7) high speed. In the case of a certain torque, increasing the speed can improve the power. In addition, the electric ...
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