CN207766162U - Induced current detects formula energy consuming brake - Google Patents

Abstract

The utility model proposes a kind of induced current to detect formula energy consuming brake, including：Motor, operation contactor KM1, dynamic braking contactor KM2, main circuit, energy-dissipating brake circuit and control circuit；The motor is connected by main circuit with three-phase alternating-current supply, and the break-make of the normally opened main contacts control main circuit of the operation contactor KM1, fuse FU1 and electrothermal relay FR provide short circuit and overload protection for main circuit；The energy-dissipating brake circuit connection three-phase alternating-current supply and motor stator, being converted three-phase alternating current to by vertoro TC makes the direct current of motor braking, electric current relay KA and current limliting regulation resistance R3 are connected in energy-dissipating brake circuit, the break-make of the normally opened main contacts control energy-dissipating brake circuit of the dynamic braking contactor KM2；The normally opened main contacts for the normally opened main contacts and the dynamic braking contactor KM2 that the control circuit controls the operation contactor KM1 realizes interlocking.The utility model precise control and of low cost.

Description

Induced current detects formula energy consuming brake

Technical field

The utility model belongs to engineering electrical apparatus field more particularly to a kind of induced current detection formula dynamic braking dress It sets.

Background technology

Dynamic braking in the conventional electrical braking of engineering electrical alternating current generator equipment at present, through frequently with velocity sensor Principle（Speed principle）Control or the time relay（Time principle）Control etc..Using the principle of velocity sensor（Speed Principle）Control：Need the installation speed sensor on the motor shaft of alternating current generator equipment, the installation of contact velocity sensor tired Difficulty, occupied space is big, and equipment is heavy；Contactless velocity sensor mounting and adjusting is difficult, and will ensure in operational process Speed accurately detection etc., price is also costly.The time relay（Time principle）Control：In different load running environment In, it is rationally accurately also different the time required to braking, if time setting is insufficient, the optimum efficiency of dynamic braking is not achieved；If Time setting is too long, increases the unnecessary run time of energy consumption braking system, consumes system equipment electric energy.

Utility model content

In view of the shortcomings of the prior art and blank, the utility model use following technical scheme：

A kind of induced current detection formula energy consuming brake, which is characterized in that including：Motor, operation contactor KM1, energy Consume braking contactor KM2, main circuit, energy-dissipating brake circuit and control circuit；The motor passes through main circuit and three-phase alternating current Source connects, and the break-make of the normally opened main contacts control main circuit of the operation contactor KM1, fuse FU1 and electrothermal relay FR are Main circuit provides short circuit and overload protection；The energy-dissipating brake circuit connection three-phase alternating-current supply and motor stator, by change repoussage Stream device TC converts three-phase alternating current in the direct current for making motor braking, and electric current relay KA and current limliting regulation resistance R3 are connected on In energy-dissipating brake circuit, the break-make of the normally opened main contacts control energy-dissipating brake circuit of the dynamic braking contactor KM2；The control The normally opened main contacts of the normally opened main contacts of operation contactor KM1 described in circuit control processed and the dynamic braking contactor KM2 are real Now interlock.

Preferably, the control circuit controls the normally opened main contacts of the operation contactor KM1 and the dynamic braking connects The interlocking of the normally opened main contacts of tentaculum KM2 passes through the normally opened contact of concatenated dynamic braking contactor KM2, operation in control circuit The normally opened contact of the normally-closed contact of contactor KM1 and concatenated operation contactor KM1, the normally closed of dynamic braking contactor KM2 are touched Point is realized.

Preferably, the control circuit accesses three-phase alternating-current supply, by fuse FU2 and electrothermal relay FR provide short circuit and Overload protection, including button SB1 and button SB2；The normally opened contact of the button SB1 control operation contactors KM1 is closed, and is used for Operation contactor KM1 is set to obtain electric；The normally opened contact and dynamic braking contactor KM2 of the button SB2 control operation contactors KM1 Normally-closed contact constitute series circuit disconnect, and control dynamic braking contactor KM2 normally opened contact be closed, for making operation Contactor KM1 dead electricity, dynamic braking contactor KM2 obtain electric.

Preferably, when the button SB1 is pressed, the normally opened main contacts of operation contactor KM1 and control electricity in main circuit The normally opened main contacts of operation contactor KM1, which is closed, in road realizes self-locking.

Preferably, the series circuit of the normally-closed contact of the normally opened contact of dynamic braking contactor KM2 and operation contactor KM1 It is also in series with the normally opened contact of the electric current relay KA, when the button SB2 is pressed, electric current relay KA obtains electric, energy consumption The normally opened of dynamic braking contactor KM2 touches in the normally opened main contacts of dynamic braking contactor KM2 and control circuit in braking circuit Point is closed and realizes self-locking.

Technical solutions of the utility model on the basis of existing technology, when using electric current relay real-time perception dynamic braking Rotor cutting D.C. magnetic field causes the size of induced current, precise control and of low cost.Solves currently available technology middling speed The inaccurate problem of detection of the difficult to install and time control method of degree detection control method, saves the electric energy of equipment operation Consumption, while this method is also applied for bidirectional movement slewing.

Description of the drawings

With reference to the accompanying drawings and detailed description to the further details of explanation of the utility model：

Fig. 1 is the utility model embodiment electrical block diagram.

Specific implementation mode

For the feature and advantage of this patent can be clearer and more comprehensible, special embodiment below is described in detail below：

As shown in Figure 1, the utility model embodiment includes：Motor M, operation contactor KM1, dynamic braking contactor KM2, Main circuit, energy-dissipating brake circuit and control circuit；Motor M is connected by main circuit with three-phase alternating-current supply, operation contactor KM1 Normally opened main contacts control main circuit break-make, fuse FU1 and electrothermal relay FR are that main circuit provides short-circuit and overload protection； Energy-dissipating brake circuit connects three-phase alternating-current supply and motor M stators, and being converted three-phase alternating current to by vertoro TC makes electricity The direct current of machine M brakings, electric current relay KA and current limliting regulation resistance R3 are connected in energy-dissipating brake circuit, electric current relay KA Rotor cuts induced current size caused by D.C. magnetic field and when electric current is less than threshold value when playing real-time perception dynamic braking Wait the effect of cut-out energy-dissipating brake circuit, the break-make of the normally opened main contacts control energy-dissipating brake circuit of dynamic braking contactor KM2； The normally opened main contacts for the normally opened main contacts and dynamic braking contactor KM2 that control circuit controls operation contactor KM1 realizes interlocking.

In the present embodiment, the normally opened main contacts and dynamic braking contactor KM2 of control circuit control operation contactor KM1 The interlocking of normally opened main contacts pass through the normally opened contact of concatenated dynamic braking contactor KM2, operation contactor in control circuit The normally-closed contact realization of the normally opened contact of the normally-closed contact of KM1 and concatenated operation contactor KM1, dynamic braking contactor KM2.

Control circuit accesses three-phase alternating-current supply, and short circuit and overload protection, packet are provided by fuse FU2 and electrothermal relay FR Include button SB1 and button SB2；The normally opened contact of button SB1 control operation contactors KM1 is closed, for making operation contactor KM1 It obtains electric；The string that the normally opened contact of button SB2 control operation contactors KM1 and the normally-closed contact of dynamic braking contactor KM2 are constituted Join circuit to disconnect, and the normally opened contact for controlling dynamic braking contactor KM2 is closed, for making operation contactor KM1 dead electricity, energy consumption Braking contactor KM2 obtains electric.

In the present embodiment, when button SB1 is pressed, the normally opened main contacts of operation contactor KM1 and control in main circuit The normally opened main contacts of operation contactor KM1, which is closed, in circuit realizes self-locking.

The series circuit of the normally opened contact of dynamic braking contactor KM2 and the normally-closed contact of operation contactor KM1 is also connected The normally opened contact for having electric current relay KA, when button SB2 is pressed, electric current relay KA obtains electric, energy consumption in energy-dissipating brake circuit The normally opened contact of dynamic braking contactor KM2 is closed realization certainly in the normally opened main contacts and control circuit of braking contactor KM2 Lock.

At this time in energy-dissipating brake circuit, three phase mains is added to motor stator winding to generate direct current after Transformer Rectifier Magnetic field is formed opposite to the direction of rotation since the rotor cutting magnetic field of inertial rotation generates great induced potential and electric current Braking moment makes rotor brake.

In braking process, motor M rotors are gradually reduced by the electromagnetic resistance rotating speed of D.C. magnetic field, what cutting magnetic field generated Induced current also reduces therewith, and when motor M rotating speeds drop to close to stop namely the induced current of cutting magnetic field generation reduces It is opened in the normally opened contact release of the threshold value of electric current relay KA normally opened contacts, electric current relay KA, then dynamic braking contactor The normally opened main contacts release of KM2 dead electricity, dynamic braking contactor KM2 is opened, and realizes that accurate power-off, dynamic braking process are completed.

This patent is not limited to above-mentioned preferred forms, anyone can obtain other each under the enlightenment of this patent The induced current of kind of form detects formula energy consuming brake, all equivalent changes done according to present utility model application the scope of the claims with Modification, should all belong to the covering scope of this patent.

Claims (5)

1. a kind of induced current detects formula energy consuming brake, which is characterized in that including：Motor, operation contactor KM1, energy consumption Braking contactor KM2, main circuit, energy-dissipating brake circuit and control circuit；The motor passes through main circuit and three-phase alternating-current supply Based on connection, the break-make of the normally opened main contacts control main circuit of the operation contactor KM1, fuse FU1 and electrothermal relay FR Circuit provides short circuit and overload protection；The energy-dissipating brake circuit connection three-phase alternating-current supply and motor stator, by Transformer Rectifier Device TC converts three-phase alternating current in the direct current for making motor braking, and electric current relay KA and current limliting regulation resistance R3 are connected on energy It consumes in braking circuit, the break-make of the normally opened main contacts control energy-dissipating brake circuit of the dynamic braking contactor KM2；The control The normally opened main contacts of the normally opened main contacts of operation contactor KM1 described in circuit control and the dynamic braking contactor KM2 are realized Interlocking.

2. induced current according to claim 1 detects formula energy consuming brake, it is characterised in that：The control circuit control The interlocking for making the normally opened main contacts of the operation contactor KM1 and the normally opened main contacts of the dynamic braking contactor KM2 passes through The normally opened contact of concatenated dynamic braking contactor KM2, the normally-closed contact of operation contactor KM1 and concatenated fortune in control circuit The normally opened contact of row contactor KM1, the normally-closed contact of dynamic braking contactor KM2 are realized.

3. induced current according to claim 2 detects formula energy consuming brake, it is characterised in that：The control circuit connects Enter three-phase alternating-current supply, short circuit and overload protection, including button SB1 and button are provided by fuse FU2 and electrothermal relay FR SB2；The normally opened contact of the button SB1 control operation contactors KM1 is closed, electric for making operation contactor KM1 obtain；It is described to press The series circuit that the normally opened contact of button SB2 control operation contactors KM1 and the normally-closed contact of dynamic braking contactor KM2 are constituted is disconnected It opens, and the normally opened contact for controlling dynamic braking contactor KM2 is closed, for making operation contactor KM1 dead electricity, dynamic braking contact Device KM2 obtains electric.

4. induced current according to claim 3 detects formula energy consuming brake, it is characterised in that：As the button SB1 When pressing, in main circuit in the normally opened main contacts of operation contactor KM1 and control circuit operation contactor KM1 normally opened main contacts It is closed and realizes self-locking.

5. induced current according to claim 3 detects formula energy consuming brake, it is characterised in that：Dynamic braking contactor The series circuit of the normally opened contact of KM2 and the normally-closed contact of operation contactor KM1 is also in series with the normal of the electric current relay KA Contact is opened, when the button SB2 is pressed, electric current relay KA obtains electric, dynamic braking contactor KM2 in energy-dissipating brake circuit The normally opened contact of dynamic braking contactor KM2, which is closed, in normally opened main contacts and control circuit realizes self-locking.