CN2200252Y

CN2200252Y - Motor protector

Info

Publication number: CN2200252Y
Application number: CN 94213940
Authority: CN
Inventors: 张维科; 卢振华; 张维新
Original assignee: 张维科
Priority date: 1994-06-10
Filing date: 1994-06-10
Publication date: 1995-06-07
Anticipated expiration: 2004-06-10

Abstract

A motor protector is an improvement on the existing technique, and an IC is connected to the voltage-reducing system of the power circuit of the protector₇、IC₈、IC₉A voice sounding system with sequentially connected voice blocks electrically connected to the electric appliance, and a sequentially connected D₁₉、R₁₁、J₂、J₁In sequence connected toTo be connected to₂₀、R₁₂、J₂The sound-producing loudspeaker has the advantages that the sound-producing loudspeaker is parallelly connected with circuits which are arranged at two ends of the sound-producing loudspeaker and used for providing power for the sound-producing loudspeaker, when the motor is in the condition of phase failure, overload and the like, the sensors receive different power signals, the sound-producing loudspeaker is controlled by the relay to provide power, corresponding languages are sent, failure occurrence reasons are provided for maintenance personnel, the problem that the conventional protector can only send failure signals but cannot indicate which type of failure, troubles are brought to the maintenance personnel is solved, and the sound-producing loudspeaker can be widely used as.

Description

Protector of motor

The utility model relates to a kind of motor protecter of motor being implemented the phase failure, overload, under-voltage running protection.

The kind of motor protecter is a lot; mainly contain current transformer; zero point electric potential detector; thermal relay etc.; more advanced is a kind of; the patent application that one key name is called " motor multi-function protector " is disclosed for No. 91218028.5 as Chinese patent; be to judge whether operate as normal of motor to detect mode that motor speed changes; mainly be by the signal voltage sample circuit; signal amplification circuit; signal is differentiated drive circuit; compositions such as signal performer; can judge exactly whether motor rotation is normal; the deficiency that exists is to point out guilty culprit, analyzing failure cause.

Task of the present utility model is: design and a kind ofly can show abort situation and motor protecter that can audio alert exactly.

Task of the present utility model realizes as follows: connect one by IC on the power supply depressurizing system ₇, IC ₈, IC ₉The speech utterance system that language blocks electrical equipment connects, and D ₁₉, R ₁₁, J ₂, J ₁Connect and the D that is connected in turn in turn ₂₀, R ₁₂, J ₂Parallel connection is added in pronunciation loudspeaker two ends and provides power supply for it.

The utility model is owing to be to add the speech utterance system on the basis of existing protector; thereby when situations such as the phase failure, overload take place transducer receive different current signals by relay be controlled to be the pronunciation loudspeaker provide power supply to send corresponding language; for the maintainer provides the fault occurrence cause; make things convenient for maintainer's repairing, saved the time of searching fault.

Fig. 1 is the schematic diagram of the utility model power supply and voice system;

Fig. 2 is the utility model governor circuit schematic diagram;

Fig. 3 is the utility model front view;

Fig. 4 is vertical view and the upward view of Fig. 3.

A most preferred embodiment of the present utility model as figure, has three through wires holes on the casing 2, induction coil is housed respectively on it, master control borad is packed in the housing, the left side is a draw and insert-type, the right side is a fastening-type, be screwed, will cover 3 then and cooperate, cover and be special construction with casing, one side is limit-type, one side is a circlip type, and line bank 5 is installed in Fig. 4 left side, the equidistant arrangement, make the lead-out wire neat appearance, panel 6 is multiple devices, and has the logic function explanation, it is installed in covers on 6, the structure of host backplane 4 adopts cover hanging, its objective is easy to use, circuit such as Fig. 1 in the main frame, shown in Figure 2, by C ₁, R ₁, C ₂, R ₂Constitute the power supply depressurizing system, in order to three kinds of high-precision regulated power supplies to be provided to load, by IC ₇, IC ₈, IC ₉Deng composition sound pronunciation system and R ₁₁, R ₁₂, D ₁₉, D ₂₀Form display circuit, its effect is respectively by J when fault ₁, J ₂Control makes this circuit can send voice (phase failure, overload) accurately, prompting and demonstration.Fig. 2 is a governor circuit, by L ₁, L ₂, L ₃, D ₁, D ₂, D ₃Form signal deteching circuit, IC ₅, BG ₂Deng the composition signal identification circuit, the automatic distinguishing signal kind of (fault) this circuit energy when signal, back output triggering BG ₂Work makes J ₂Adhesive drives voice and display circuit work, by: I _C6, R ₃, R ₄, R ₅In composition power supply trace circuit, whether purpose is to discern load (motor) and works, shut down as the workman, and its energy automatic disconnection complete machine power supply of the present utility model, when start, it again can the automatic open close power supply.By IC ₁, IC ₂, IC ₃, IC ₄Form amplifying circuit respectively, the circuit of adjusting, integrating circuit, delay circuit.The scope of application of the present utility model is: 0.5 watt-40 watts motor all can use, by the motor of circuit in order to the different size of adjusting of adjusting, to guarantee the utility model operate as normal.Because motor is an inductive load, electric current is very big during starting, is 5-7 times of operating current approximately, does not disturb the work of this machine for making this electric current, has designed IC ₄The start delay circuit is in order to suppress disturbance current in short-term, IC ₃The effect of integrating circuit is normally really to discern overload signal, and is bigger as overload current, this motor-driven time weak point of doing.

Its operation principle is: as Fig. 2, governor circuit is by L ₁, L ₂, L ₃, D ₁, D ₂, D ₃Form signal deteching circuit, IC ₅, BG ₂Deng forming signal identification circuit, when signal (fault), this circuit automatically after the distinguishing signal kind output trigger BG ₂Work makes J ₂Adhesive drives voice and display circuit work, thereby sends corresponding voice, that is: when the motor phase failure, by IC ₆, BG ₂Form signal and differentiate control relay J ₂Detect a signal, make the actuating of relay, voice are connected and are sent phase failure indication simultaneously, when overload, by R ₃, R ₄, R ₅Through the testing circuit that W forms signal is sent into amplifying circuit, for voice provide the power supply voice it is sounded through relay.

Claims

1, a kind of motor protecter, it comprises governor circuit, power circuit, of the present utility model being characterised in that: connect a sound circuit on the depressurizing system of power circuit.

2, protector as claimed in claim 1 is characterized in that: said sound circuit comprises one by IC ₇, IC ₈, IC ₉Block of speech becomes speech utterance system that electrical equipment connects to form and the D that connects in turn ₁₉, R ₁₁, J ₂, J ₁, with the D that is connected in turn ₂₀, R ₁₂, J ₂Parallel connection adds to the phonological working circuit provides power supply.