The motor can be categorized in several ways, but generally it is divided into a single-phase and a three-phase motor depending on how many phases the electrical source provides.
Functionally, the motor can be grossly divided into three types.
|Motor of Constant Speed
|Motor width Brake Function
|Motor width Speed Controlling
When an electrical connection is established to this motor, it spins and you can access the power source easily, and it is currently used for various purposes, including household and industrial appliances,as well as in the automation of production lines.
|Wide Variety Of Motors
|Low Noise and Low Vibration
|Ease of Use
(AC : Alternating Current)
(DC :Direct Current)
The output is an amount of work accomplished by the motor in unit time and it is represented by the product value of the revolutions and the torque. The rated out is indicated in the motor.
Output = 1.027 x T x N [WATTS]
The torque of the motor is a rotating torque that makes a rotor start working and the unit is [g · cm] or [kg · cm]. [N.m] [oz·in], [lb·in] is used by countries.
[1kg·cm = 0.0981 N·m = 98.1 mN·m = 13.9oz·in = 0.868 lb·in]
The torque of 1 kg · cm is the same as the rotating torque when 1kg of the force is added perpendicularly to a point in the output sphere of 1cm-radius rotor.
Starting Torque (① in Fig)
Stalling Torque (② in Fig)
Rated Torque (③ in Fig)
Synchronous Revolutions (④ in Fig)
Example) If the motor has 4 poles and the power source frequency is 60Hz.
And if the motor has 4 poles and the power source frequency is 50Hz,
No-load Revolutions (⑤ in Fig)
Rated Revolutions (⑥ in Fig)
Example) If an induction motor of 4 poles and 60Hz is operating with a slip S = 0.1,
The static torque is a torque experienced when a load is being imposed while the electromagnetic brake and the clutch brake are stopped.
The ambient torque is a maximum torque allowable to use when the motor is operating. This torque has a limitation by the rated torque, the temperature-rise, and the strength of the assembled gearhead.
This is an excessive number of revolutions, expressed as angular degrees, that the motor makes from the moment of power shut-off until the motor stops.
|Maximum Ambient Torque
|Delivery Efficiency Rate
|Type of Insulation
|Made of materials like cotton, silk, and paper. Materials not impregnated in varnishes or oils.
|Made of the same kinds of materials as described in Class Y. Materials impregnated in varnishes or oils
|Polyurethane resin for enamel wire, epoxy resin, accumulated cotton material, and accumulated paper material.
|Materials made of mica, asbestos, glass fiber using adhesive agent.
|Made of the same kinds of materials as described in Class B using adhesive agent such as silicon alkaloid resin, etc.
|Made of the same kinds o materials as described in Class B and F with silicon resin or equivalent materials.
|Made solely by original mica, asbestos, or ceramic, or together with adhesive agent.
It is advised to use the motor at the ambient temperature between -10℃ and +40℃. If the motor is operating in an environment of the temperature higher than the maximum ambient temperature or inside a house, the heat emitted by the increased temperature of the motor is added to the ambient temperature so that the lifetime of the winding coil and the ball bearing shortens significantly. The operation of the motor in a too low temperature environment also causes problems associated with starting of the motor. In addition, the decrease of the interrelative influence of the gearhead's lubricating grease and the ball bearing causes the frictional torque to be increased. As a result, the motor does not get started or takes longer time to start.
A thermocouple of temperature multipoint reorder is attached at the center of the housing (the motor case) in order to check the housing temperature saturation caused by the heat the motor releases. The difference of the saturated temperature and the ambient temperature is called a temperature rise and the unit of th temperature is deg. In general, the part that has a highest temperature in the motor is a winding section. The maximum ambient temperature of the winding section is specified as K.S. standards for each type of insulation material.