Motor load simulation method
A technology of load simulation and accompanying test motor, which is applied in the field of electrical control, can solve the problems of elevator speed limitation, high cost, difficult control of accompanying test motor, etc., and achieve the effect of simple control, simple installation and low cost
Active Publication Date: 2012-06-13
SHANGHAI UNIV OF ENG SCI +1
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Problems solved by technology
At present, there are quite a few elevator manufacturers and research institutions that build elevator shafts to test the performance of the drive system. The disadvantages of this method are that the speed of the elevator is limited, the installation is inconvenient, and the cost is high.
There is also a load simulation test bench for experiments. The load simulation test bench is usually composed of brakes, sensors, bases, and controllers. This test bench cannot simulate the working state of the elevator car side that is heavier than the counterweight and the elevator is going down.
Some manufacturers try to use two motors to drag the test, and some have installed a flywheel on the shaft from the brake to the motor to be tested in order to simulate the inertia of the elevator. Mutual influence makes it difficult to control the motor under test
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[0038] Take the synchronous motor produced by an elevator motor factory as an example to illustrate the implementation method. The power of the motors produced by this factory is between 3KW and 27.5KW, the rated torque is between 200Nm and 1320Nm, the diameter of the shaft is between 320mm and 550mm, and the speed is between 96rpm and 199rpm. In order to meet the measurement conditions of all motors, The motor to be tested should meet the requirements that the power, speed, and rated torque are greater than or equal to the motor to be tested. You can choose a permanent magnet synchronous motor with a power of 27.5KW, a rated torque of 1320Nm, and a rated speed of 199rpm as the motor to be tested.
[0039] The magnetic powder clutch is used to transmit the torque, the slip power is 16KW, and the rated torque is 2000NM.
[0040] The speed and torque sensors must also meet certain measurement indicators. The torque measurement range is 0-5000NM, the speed measurement range is 1...
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The invention relates to a motor load simulation method. A torque variation curve is set in a controller, corresponding control current is generated and supplied to a clutch, a band-type brake is opened after test is started, rotating speed difference is maintained between a motor accompanied in test and a motor to be test, and torque is transmitted to the motor to be tested, thus simulating torque variation condition in elevator operational process. Compared with the prior art, the invention has simple mounting and low cost, the invention causes control on the motor accompanied in test to besimple, only requires the motor accompanied in test maintains certain speed and torque and does not require the speed and torque to be concrete value; besides, compared with well test, the invention has the advantages that the rotating speed of the transmission shaft of motor to tested is not restricted, rotating speed from zero to rate rotating speed of motor can be measured, thus being beneficial to test carried out when developing high speed elevator.
Description
technical field [0001] The invention relates to the field of electrical control, in particular to a motor load simulation method. Background technique [0002] In contemporary society, motors are used more and more widely, and mechanical equipment with motors as the driving source abounds. The characteristics of motors and motor controllers together determine the mechanical performance and energy consumption of the drive system. In the elevator industry, the gearless traction method composed of rare earth permanent magnet synchronous motors highlights the characteristics of permanent magnet synchronous motors that are easy to make at low speed and high power. The energy feedback braking method is a classic braking method, which can realize the four-quadrant operation of the motor, realize fast forward and reverse rotation, and precise braking, which can save energy. In order to develop a high-performance elevator driven by a permanent magnet motor with energy feedback, a co...
Claims
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IPC IPC(8): G01R31/34
Inventor 余朝刚刘启中
Owner SHANGHAI UNIV OF ENG SCI