Monthly Archives: February 2015

Gear Motor’s Characteristics and Application

The gear motor is generally used for low speed and large torque transmission equipment which is to decelerate the high-speed working equipment through the input shaft of the speed reducer’s less-teeth gear less engages with the output gear axle. Gear motor 60KTYZ-2 is a synchronous motor which is incorporated by a permanent magnet synchronous motor and a retarding mechanism.

Gear Motor

With small power consumption, large torque, low noise, small size, light weight, convenient use, it can remain stable and the motor speed can not be influenced by voltage in the rated frequency. If the gear motor overload or stall when it loads, motor coil will not be burned. Gear motor is mainly applied to monitor the PTZ, electric appliance, cooling- heating valve, automatic instrument, electric model, electric advertisement, mahjong table, screen machine, laminator, currency-counting machine, barbecue equipment, display cabinets, hot dog machine, electric apparatus and all small subpoena power and low constant speed running equipment.

DC Brushless Motor’s Structure and Function

Brushless DC motor, which is made up of a drive and the electric motor, is a typical electromechanical product. The stator winding of the electric motor is wye connected triphase symmetrically which is very similar with three-phase asynchronous motor.

brushless dc motor

brushless dc motor

The rotor of the motor is stuck with a permanent magnet which has been magnetized. A position sensor is equipped in the motor in order to detect the polarity of the rotor. The drive is constituted by power electronic devices and integrated circuit. It has four main functions as following. First, a drive receives the signal when the motor starts, stops and brakes in order to control the motor correspondingly.

Second, it receives the position sensor signal and a positive reversal signal to control the switch of the inverter’s each power transistor and produce continuous torque. Third, it receives the speed command and speed feedback signal to control and adjust the speed. Fourth, it provides protection and display space.

DC Motor Speed Control: Characteristics and Principle

DC motor has good performance of controlling speed. The performance of speed control means that the motor artificially change its speed under certain load conditions based on the need. DC motor can do the stepless speed regulation evenly and smoothly and has wide speed range under the conditions of heavy load. And the other advantage of DC motor speed control is the large starting torque which can control the speed evenly and economically. Therefore, the machine which starts under heavy load or requires uniform speed control, such as large reversible rolling mill, hoist, electric locomotives, trams, is driven by DC motor.

DC Motor Speed Control
The principle of DC motor is to make the armature to be effected by electromagnetic torque in one direction. The key point is how will the direction of the current flowing through the coil transform in time when the coil side is in the different polarity of the magnetic pole. So we must add a device called commutator with the brush to ensure that each pole current coil side is always in one direction. Then the motor can rotate continuously.