Resistor of transducer apply the brake is the carrier that is used at the second birth energy electromotor to be used up with heat energy means, it includes resistor block value and power size two important parameter. Resistor of apply the brake basically is to be used use up apply the brake of servo electric machinery (stop urgently) when the energy of generation, may burn out otherwise driver.

 

 

 

 

The electric machinery that transducer drives or other and perceptual load are in stop machine when, commonly the means that uses apply the brake of specific power consumption comes true, the cost that can pass to fasten with respect to the magnetism inside the kinetic energy that is an electric machinery after stopping and coil can component is used up, come true to jockey quickly thereby. After power supply stops, the inversion circuit of transducer turns over guide to connect, the dc generatrix that feedbacks these odd electric energy to transducer comes up, voltage of dc mother on-line will be elevatory because of this, should lift when be worth certainly, the resistor of apply the brake of transducer moves with respect to investment, the means that makes this part electric energy gives out heat through resistor is used up, maintain voltage of dc mother on-line to be worth normally for at the same time.

 

 

 

 

When servo report mechanism is moved, this servo electric machinery is in generate electricity condition. This means energy to will return the dc generatrix of servo driver. Because dc generatrix includes electric capacity, so dc generatrix voltage can rise. Voltage increases more or less to depend on the kinetic energy of the electric machinery when beginning apply the brake and the size that dc generatrix electrify holds. If kinetic energy of apply the brake is more than capacitance of dc mother on-line, this energy is accommodated without other drive on dc generatrix at the same time, so driver will waste this energy through resistor of apply the brake, perhaps give power supply source its feedback.

 

 

 

 

When electric machinery decelerate, too big equipment inertia can turn electromotor into the dynamo, this is to stem from generate electricity moving condition, electric machinery gives transducer power supply reversely, this meeting causes transducer to be pressed too call the police. To release this part energy, use increase resistor power (reduce resistance appropriately) the method will come true. Also have use but retrorse power supply arrives of power source loop, what this applies in the frequency conversion system that sheds bus bar continuously in all is more, but energy-saving. Resistor of apply the brake and generate electricity the effect is same, can prevent transducer decelerate to be pressed too, reduce decelerate distance, improve dynamic performance.

 

Brake of the buy inside electric machinery is to do commonly jockey finally of apply the brake, and do not make retarding brake, this and resistor apply the brake have substaintial distinction, because resistor apply the brake has electric machinery only,is effect in the process of decelerate, there is the effect after electric machinery stops, must use brake ability to let electric machinery keep dormant (have potential energy load) .

 

 

 

 

In frequency control system, of electric machinery fall fast and stop machine will come true through reducing frequency gradually, in the instant that frequency reduces, the synchronous rotate speed of electric machinery drops subsequently, and as a result of mechanical and inertial reason, the rotor rotate speed of electric machinery did not change. When synchronous rotate speed is less than rotor rotate speed, of rotor electric current phasic changed 180 degrees almost, electric machinery turns into from dynamoelectric condition generate electricity condition; Meanwhile, the torsion on electric machinery axis turned apply the brake into torsion, make the rotate speed of electric machinery drops quickly, electric machinery is in regenerative braking condition. Dc road feedbacks after commutate of Quan Bo of diode of follow on current of classics of electric energy of electric machinery reborn. Because the electric energy of dc road cannot pass rectification bridge to pass on electrified wire netting, the capacitance that relies on transducer itself only is absorbed, although other part can waste electric energy, but the charge that capacitance still has short time piles up, form “ pump to rise voltage ” , make volts d.c. elevatory. Exorbitant volts d.c. will make each part parts of an apparatus is damaged.

 

Because this is in mechanical and inertial in older system, need uses resistor of apply the brake, wait like machine of machine tool of elevator, numerical control, promotion

 

 

 

 

The type selecting of resistor of apply the brake: Behavioral voltage 710V

 

1) resistor power (kilowatt) kilowatt of = electric machinery counts *(10%- – 50%) ,