Selection of slurry pump motor
安徽快3开奖结果1. Type and selection of motor
The common forms of motor are three-phase AC squirrel cage asynchronous motor, three-phase AC wound asynchronous motor, three-phase synchronous motor and DC motor。
(1) three phase AC squirrel cage asynchronous motor。 It has the advantages of simple structure, baggable operation, convenient maintenance, low price, small volume, etc。, but it has poor starting performance, no speed regulation, low power factor when no-load, but it can also achieve speed regulation when equipped with frequency conversion settings or other speed regulation types。 At present, three-phase AC squirrel cage asynchronous motor is widely used, which is generally used without special requirements。
(2) three phase AC wound asynchronous motor. It has the advantages of speed regulation, high starting torque, improvement of power factor, high power, high efficiency, speed stability, etc., but it needs components such as brush slip ring or rectifier, which is more difficult to maintain than squirrel cage motor, and the price is also slightly expensive, and with the increase of load torque, the speed of electric machine will significantly decrease.
安徽快3开奖结果(3) synchronous motor. When the load torque changes within the allowable limit, it has the advantages of constant speed, adjustable power factor, etc., but it needs a special excitation system, which is more complex in structure, high in cost, large in maintenance, and less safe than the squirrel cage motor, so it is often used in pumps requiring constant speed, low speed and large capacity.
(4) DC motor. Only when there is DC power supply or equipment, it needs to be equipped with emergency battery pack. It can be used in special occasions with small power and low speed. Slurry pump