PU516 直流电机的励磁绕组和电枢绕组如果彼此直接反

描述

PU516 直流电机的励磁绕组和电枢绕组如果彼此直接反

PU516应查看步进电机的绝缘，最好在接线之前完成对电机的单体调试查看，当电机契合现行标准要求时，再接外部线。一般低压电机的绝缘电阻要求大于0.5MΩ，摇表使用500V。

但是，直流电机的励磁绕组和电枢绕组如果彼此直接反，就可能使电机电枢带电时，励磁绕组不带电而失磁，使电机空载时可能飞车，重载时烧坏转子。因而，直流电机的电枢绕组和励磁绕组的外部接线肯定不可彼此直接错。

电机的外接线。电机接外部电线之前，应先查看端盖内的各个绕组引出端是否有松动现象，当内部引出线的压接螺丝上紧之后，才干按要求的接线办法连接短路片，并压接外部线。

电机装置和接线结束之后，电机试运转前，工程师在此建议客户这时应主要进行下列查看：

（1）土建清扫整理结束；

（2）电机单体装置、查看结束；

（3）电机操控回路等二次电路的调试结束，工作正常；

（4）搬动电机转子时，转动灵敏，无碰卡现象；

（5）电机主回路体系的悉数接线固定结实，无任何松动；

（6）其他附属体系齐全合格。

在上述六条中，装置电工应特别注重第五条，这里所述的主回路体系是指自配电柜的电源输入至电机接线柱的悉数主电路接线，都要连接结实。即每个刀开关、空气开关、接触器、熔断器和热继电器，配电柜端子排的各个上、下接点及电机接线均要压接牢靠，才干确保电机牢靠安全运转，否则，就有烧坏电机的风险。

步进电机在试运转时，PU516要监视电机的电流是否超越规定值，并作记载。别的，还应查看下列项目：

（1）电机的旋转方向是否契合要求。沟通电机反向时，PU516任意交换两根电机接线即可；直流电机反向时，能够交换两根电枢电压接线，也可改动两根励磁电压接线。

（2）电机运转的声响契合要求，即无冲突声、尖叫声、卡碰声及其他不正常的声响，否则应停机查看。

PU516 直流电机的励磁绕组和电枢绕组如果彼此直接反

PU516 should check the insulation of the stepper motor, it is best to complete the monomer debugging of the motor before wiring, and then connect the external line when the motor meets the current standard requirements. Generally, the insulation resistance of low-voltage motors is required to be greater than 0.5MΩ, and the table uses 500V.

However, if the field winding and armature winding of the DC motor are directly opposite each other, it may make the motor armature charged, the field winding is not charged and magnetization is lost, so that the motor may run fast when it is unloaded, and the rotor is burned out when it is overloaded. Therefore, the external wiring of the armature winding and the excitation winding of the DC motor must not be directly wrong with each other.

External wiring of the motor. Before the motor is connected to the external wire, it is necessary to check whether the leading end of each winding in the end cover is loose. When the crimping screw of the internal lead wire is tightened, the short circuit sheet can be connected according to the required wiring method and the external wire is crimped.

After the motor installation and wiring is completed, before the motor test run, the engineer hereby recommends that the customer should mainly carry out the following review at this time:

(1) Completion of civil cleaning;

(2) Single motor device, view end;

(3) The debugging of the secondary circuit such as the motor control circuit is completed and the operation is normal;

(4) When moving the motor rotor, the rotation is sensitive and there is no bumping phenomenon;

(5) All the wiring of the main circuit system of the motor is fixed and strong, without any loosening;

(6) Other subsidiary systems are complete and qualified.

In the above six, the device electrician should pay special attention to the fifth, the main circuit system referred to here refers to the power input from the power distribution cabinet to the motor terminal all the main circuit wiring, should be connected firmly. That is, each knife switch, air switch, contactor, fuse and thermal relay, each upper and lower contact of the terminal block of the distribution cabinet and the motor wiring should be pressed firmly to ensure the safe operation of the motor, otherwise, there is the risk of burning the motor.

When the stepper motor is in trial operation, PU516 should monitor whether the current of the motor exceeds the specified value and make a record. In addition, you should also look at the following items:

(1) Whether the rotation direction of the motor meets the requirements. When the communication motor is reversed, the PU516 can arbitrarily exchange two motor connections; When the DC motor is reversed, two armature voltage lines can be exchanged, and two excitation voltage lines can also be changed.

(2) The sound of the motor operation meets the requirements, that is, there is no conflict sound, screaming, clamping sound and other abnormal sounds, otherwise it should be stopped for check.