The definition of secondary loop

high efficiency high power electric motor Y2 motor

Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
In the electrical system of transformer secondary windings, measurement monitoring instrument, relay, automatic acmotor2.blogspot.com devices such as cable stitch control through the circuit. Used to control, protection, regulation, measurement and monitoring in the primary loop parameters and the working condition of each element. For monitoring gauge meter, control operation signal, relay protection and automatic device of the electrical connection in the circuit are referred to as the secondary loop or secondary wiring. Work refers to a device for monitoring, control, measuring, regulation and protection, the motor configured, such as: measuring instrument, relay, control and signal components, automatic device, relay protection device, such as current, voltage transformer, according to certain request together of electrical circuits, referred to as the secondary wiring generator set or secondary loop. A circuit composed of generator, transformer, power cable, circuit breaker, disconnecting switch, voltage, current transformer, lightning arrester, such as circuit consisting of, called a connection or give priority to.

Positive pressure type motor

gost motor 7.5kw
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
 It's a type of positive pressure type electrical equipment. The electric motor 12v 500w structure features are: (1) have a full configuration of ventilation system, the motor internal may affect the structure of the ventilation blind Angle. (2) shell and tube made of noncombustible wholesalemotor.blogspot.com materials, and has enough mechanical strength. (3) within the shell and the main relative to the outside world keep enough positive pressure air. (4) the motor must have a safety device (e.g., time relay and flow monitor), to ensure adequate ventilation, also must have the shell pressure under voltage automatic protection and alarm device. (5) ac motor quick open the door or cover shall be on shell with power interlock device. In China there is no unified positive pressure type electric motor motor series products.

Accurate meaning of the PT and CT

Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor

Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
 CT, CT (Current Transformer), English spelling Current Transformer, is the primary side large Current, in proportion to fit through the instrument or use the ac electric motor relay, rated Current 1 a to 5 a or the transformation of equipment. Its working principle and the transformer is similar. Also known as TA or LH (old symbols). Working characteristics and requirements: 1, a winding and high voltage circuit in series, only depends on the high pressure loop current I1, and has nothing to do with the secondary load. 2, secondary loop are not allowed to open, otherwise will produce dangerous high voltage, endangers one's personal and equipment safety. 3, CT secondary loop must have some grounding directly, prevent after the primary and secondary windings insulation breakdown of high voltage, but only a little ground. The accuracy of the 4, and transformation. Wiring forms are: the three-phase y connection completely, two-phase incomplete connection, two motor vehicle differ lift, two-phase three star connection, single-phase completely. Note: Three phase motor the current transformer for measuring core should be easy to saturated when a short-circuit, to limit the growth of secondary side current ratio; Core for relay protection, should not be saturated when a short-circuit, make the secondary side of current with the primary side current is directly proportional to increase.

Vector control

In the past ten years or twenty years, servo motor market has to shift from a brush servo to brushless servo market, this is mainly due to the low maintenance brushless servo rate and high stability. In this decade, the driving part of the circuit and system aspects of the development of permanent magnet generator technology has been very perfect. Control mode has completely can realize the function described those keywords. Most of the high-performance servo system is controlled by an internal loop to control the torque. The ring by external and internal generator set spare parts torque speed www.dongfeng-motor.com loop and position loop with different control effects in order to achieve. External control loop design is has nothing to do with the matching motor, and the design of the internal torque loop ac motor is closely related to the performance of the matched motor. A brush motor torque control is very simple, because there are brush motor commutation work can be completed. Output torque is poles and a brush motor dc voltage proportional to the input. Torque can be easily controlled by P - I control circuit. P - I the main functions of the control circuit is controlled by detecting the actual current and electric current, the deviation between the input voltage of the motor was adjusted dynamically in real time.

The working principle of four-way reversing valve

When electric motor price the electromagnetic valve is not electricity,work on the refrigeration system and the role of control valves for spring 1,valve core moves to the left side,is in a state of release,capillary E and C connected at this time. www.facebook.com/guohong.trading Because E on the low pressure suction tube,capillary C and main valve inside the left space for the low pressure,high pressure gas nozzle enters the main valve by the main valve,the main valve piston I vent in the right end of the space to become a high pressure,promote the main valve valve core is moved to the left,nozzle and nozzle 1 2 connecting the nozzle with the nozzle 3 in 4 and status form the refrigeration cycle system When the solenoid valve electricity,electromagnetic force pull-up control valve valve core to the right,capillary E connected to D. ac motor The main valve in the right space become low voltage,high pressure gas is entered into the main valve piston lamination II vent in the left space,promote the valve core to move to the right end,nozzle and nozzle 3 2 connecting the nozzle with the nozzle 1 in 4 and the function of the evaporator,condenser,exchange,system is transformed into heating circulation state.