Method for measuring equivalent rotation copper consumption of squirrel cage-type asynchronous motor
A technology for copper consumption of asynchronous motors and rotors, which can be used in measuring electricity, measuring electrical variables, testing motor generators, etc., and can solve problems such as increased fundamental frequency stray losses
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] Please refer to figure 1 , a method for measuring the equivalent rotor copper loss of a squirrel-cage asynchronous motor of the present invention comprises the following steps:
[0024] Step 1. Block the rotor of the squirrel-cage asynchronous motor to be tested. The measures to block the rotor generally include: a) clamp the shaft extension with a special splint, b) clamp the shaft extension with a special clamp, c) use a Hardwood boards support shaft extensions, etc.
[0025] Step 2: Apply a three-phase symmetrical low voltage U with a slip frequency to the stator winding of the squirrel-cage asynchronous motor 1 ;Depend on figure 1 The equivalent circuit of the motor locked-rotor test shown, the calculation formula is Estimated value U can be obtained 1 , U 1 yes The magnitude of ; where: The phase voltage of the ...
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