CN202602569U - Soft starting box - Google Patents

Abstract

The utility model relates to a soft starting box. The soft starting box comprises a plastic housing breaker, a central processing unit (CPU) module, a display operation keyboard, a switching power supply/phase loss phase sequence protection integrated module, an alternating current contactor, a silicon controlled radiator combination module and a temperature sensor, the plastic housing breaker is connected into a three-phase power supply from a major loop, the display operation keyboard is connected out of the CPU module an output end of the plastic housing breaker is provided with a two-way extension wire, a first way of the extension wire is connected with a motor load through the alternating current contactor from an output end of the plastic housing breaker, the silicon controlled radiator combination module is in a parallel connection with two ends of the alternating current contactor, the temperature sensor is arranged on the silicon controlled radiator combination module, a second way of the extension wire is connected to the display operation keyboard by sequentially passing through the switching power supply/phase loss phase sequence protection integrated module and the CPU module from the output end of the plastic housing breaker, and the CPU module is respectively connected with the switching power supply/phase loss phase sequence protection integrated module, the alternating current contactor, the silicon controlled radiator combination module and the temperature sensor to acquire signals and control and protect lines. The soft starting box is small in size, simple in structure and long in service life.

Description

The soft start case

Technical field

The utility model relates to a kind of electric motor starting equipment, relates in particular to a kind of soft start case.

Background technology

Those skilled in the art should know; Electric current when threephase asynchronous directly starts can reach 6-7 times of rated current; Moment impact to electrical network is very big, in therefore actual the use, generally adopts soft initiator that a smooth transition is carried out in the startup of motor; And then reduce because of the excessive influence degree to electrical network of immediate current, make equipment such as electrical network and mechanical load be able to effective protection.

Cabinet type or the box soft initiator of general in the market employing, because the parts of configuration are more, complex structure, therefore, volume is all generally bigger, and is difficult for carrying, and limitation is arranged when installing and using unavoidably, and the scope of application is restricted; In addition because the radiating effect of soft initiator is generally not good, generally all be on the heating components and parts or near radiator is set mode dispel the heat, therefore when hot weather, it is not good that radiating effect often seems.

Summary of the invention

The purpose of the utility model is to overcome the defective of prior art, and the soft start case of little, the simple in structure and good heat dissipation effect of a kind of volume is provided.

For realizing above-mentioned purpose, the utility model adopts a kind of soft start case, comprising:

Insert the breaker of plastic casing of three phase mains from major loop;

The CPU module; The display operation keyboard that picks out from the CUP module;

Switching Power Supply/phase failure phase sequence integrated module: wherein Switching Power Supply part is in order to providing stable power to the CPU module, and overvoltage, the undervoltage condition that voltage signal produces in order to the control motor load to the CPU module is provided and then in time protects motor load; Phase failure phase sequence partly is used for three-phase power supply phase sequence phase failure situation is in time fed back to the CPU module, and then prevents that motor load from causing economic loss when misphase reverses the startup operation;

A.C. contactor: be used to control the motor power frequency operation;

Controllable silicon radiator composite module: be used for motor and steadily quicken starting, the big electric current when reducing electric motor starting and to the impact of electrical network;

Temperature sensor: be used for monitoring in real time the temperature of controllable silicon radiator composite module and in time send signal to the CPU module;

The output of wherein said breaker of plastic casing has two road extension wires; The first via directly connects motor load via A.C. contactor by the output of breaker of plastic casing; Wherein said controllable silicon radiator composite module is connected in parallel on said A.C. contactor two ends, and said temperature sensor is arranged on the controllable silicon radiator composite module; Secondary route breaker of plastic casing output picks out to the display operation keyboard via Switching Power Supply/phase failure phase sequence integrated module, CPU module successively; Said CPU module also is connected acquired signal respectively and reaches into controlling protection circuit with said Switching Power Supply/phase failure phase sequence integrated module, A.C. contactor, controllable silicon radiator composite module and temperature sensor.

The utility model further is set to said soft start case and comprises that also the current signal when being used for electric motor starting gathers the current transformer to the CUP module; This current transformer is serially connected on the three-phase electricity of said breaker of plastic casing output, and its secondary circuit is connected with the CPU module.

The utility model further specifically is set to said CPU module again and comprises:

Acquisition module: be used for signals collecting and judgement with current transformer, Switching Power Supply/phase failure phase sequence integrated module, temperature sensor;

Control module: be used to control the silicon controlled angle of flow, reach the A.C. contactor power supply.

The utility model is through the improvement to prior art; Through of the timely control protection of CPU module to situation such as the phase shortage that possibly occur, under-voltage, overvoltage, overcurrent, excess temperature or three-phase imbalances; And the silicon controlled angle of flow has also been carried out effective control, the output voltage of soft initiator is slowly risen, and then made the motor smooth starting; A.C. contactor adhesive when motor arrives rated current, controllable silicon ends; In sum, the components and parts of the utility model have carried out modular integrated, have effectively reduced the volume of soft start case; Be convenient to carrying and install; And, especially the signal of temperature sensor is judged control, when reaching critical temperature through the Based Intelligent Control of CPU module; The CPU module can be sent control signal timely and effectively and stop controllable silicon work; Avoided controllable silicon overheated and situation that damage takes place from the source, therefore, well imagined the useful life that effectively raises the soft start case in conjunction with above-mentioned factor.

Description of drawings

Fig. 1 is the frame principle figure of the utility model embodiment.

Fig. 2 is the catenation principle figure of CPU module among the utility model embodiment.

Fig. 3 is the embedding structure line map of soft start case among the utility model embodiment.

Embodiment

Shown in Fig. 1-3, the specific embodiment of the utility model is a kind of soft start case, comprising:

Insert the breaker of plastic casing 4 of three phase mains from major loop;

CPU module 2; The display operation keyboard 1 that picks out from the CUP module;

Switching Power Supply/phase failure phase sequence one phantom 3: wherein Switching Power Supply part is in order to providing stable power to CPU module 2, and overvoltage, the undervoltage condition that voltage signal produces in order to the control motor load to CPU module 2 is provided and then in time protects motor load; Phase failure phase sequence partly is used for three-phase power supply phase sequence phase failure situation is in time fed back to CPU module 2, and then prevents that motor load from causing economic loss when misphase reverses the startup operation;

A.C. contactor 6: be used to control the motor power frequency operation;

Controllable silicon radiator composite module 7: be used for motor and steadily quicken starting, the big electric current when reducing electric motor starting and to the impact of electrical network;

Temperature sensor 8: be used for monitoring in real time the temperature of controllable silicon radiator composite module 7 and in time send signal to CPU module 2;

The output of wherein said breaker of plastic casing 4 has the two-way extension wire; The first via directly connects motor load via A.C. contactor 6 by the output of breaker of plastic casing 4; Wherein said controllable silicon radiator composite module 7 is connected in parallel on said A.C. contactor 6 two ends, and said temperature sensor 8 is arranged on the controllable silicon radiator composite module 7; Secondary route breaker of plastic casing 4 outputs insert Switching Power Supply/phase failure phase sequence integrated module 3, CPU module 2 picks out to display operation keyboard 1; Said CPU module 2 also is connected with said A.C. contactor 6, controllable silicon radiator composite module 7 and temperature sensor 8 respectively, is used for acquired signal and controls protection circuit.

Can know in conjunction with Fig. 1 and Fig. 3; In the present embodiment; Said soft start case comprises that also the current signal when being used for electric motor starting gathers the current transformer 5 to CUP module 2, and this current transformer 5 is serially connected on the three-phase electricity of said breaker of plastic casing 4 outputs, and its secondary circuit is connected with CPU module 2.

In the present embodiment, said CPU module comprises:

Acquisition module: be used for signals collecting and judgement with current transformer 5, Switching Power Supply/phase failure phase sequence integrated module 3, temperature sensor 8; To situation such as phase shortage, under-voltage, overvoltage, phase sequence, overcurrent, excess temperature or three-phase imbalances control protection timely is provided,

Control module: be used to control the silicon controlled angle of flow, the output voltage of soft initiator is slowly risen, and then make the motor smooth start, A.C. contactor 6 adhesives when motor arrives rated current, controllable silicon ends.

More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The protection range that the utility model requires defines according to appended claim and equivalent thereof.

Claims (3)

1. soft start case is characterized in that: comprising: from major loop insert the breaker of plastic casing, CPU module of three phase mains, the display operation keyboard that picks out from the CUP module,

Switching Power Supply/phase failure phase sequence integrated module: wherein Switching Power Supply partly is used to provide stable power to the CPU module, and provides voltage signal to be used to control overvoltage, the undervoltage condition of motor load generation and then in time protect motor load to the CPU module; Phase failure phase sequence partly is used for three-phase power supply phase sequence phase failure situation is in time fed back to the CPU module, and then prevents that motor load from causing economic loss when misphase reverses the startup operation;

A.C. contactor: be used to control the motor power frequency operation;

Controllable silicon radiator composite module: be used for motor and steadily quicken starting, the big electric current when reducing electric motor starting and to the impact of electrical network;

Temperature sensor: be used for monitoring in real time the temperature of controllable silicon radiator composite module and in time send signal to the CPU module;

The output of wherein said breaker of plastic casing has two road extension wires; The first via directly connects motor load via A.C. contactor by the output of breaker of plastic casing; Wherein said controllable silicon radiator composite module is connected in parallel on said A.C. contactor two ends, and said temperature sensor is arranged on the controllable silicon radiator composite module; Secondary route breaker of plastic casing output picks out to the display operation keyboard via Switching Power Supply/phase failure phase sequence integrated module, CPU module successively; Said CPU module also is connected acquired signal respectively and reaches into controlling protection circuit with said Switching Power Supply/phase failure phase sequence integrated module, A.C. contactor, controllable silicon radiator composite module and temperature sensor.

2. soft start case according to claim 1; It is characterized in that: comprise that the current signal when being used for electric motor starting gathers the current transformer to the CUP module; This current transformer is serially connected on the three-phase electricity of breaker of plastic casing output, and its secondary circuit is connected with the CPU module.

3. soft start case according to claim 1 and 2 is characterized in that: said CPU module comprises;

Acquisition module: be used for signals collecting and judgement with current transformer, Switching Power Supply/phase failure phase sequence integrated module, temperature sensor;

Control module: be used to control the silicon controlled angle of flow, reach the A.C. contactor power supply.

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