CN1053518A - A kind of temperature difference control type automatic drying device of electric machine - Google Patents
A kind of temperature difference control type automatic drying device of electric machine Download PDFInfo
- Publication number
- CN1053518A CN1053518A CN 91106038 CN91106038A CN1053518A CN 1053518 A CN1053518 A CN 1053518A CN 91106038 CN91106038 CN 91106038 CN 91106038 A CN91106038 A CN 91106038A CN 1053518 A CN1053518 A CN 1053518A
- Authority
- CN
- China
- Prior art keywords
- voltage
- controllable silicon
- power supply
- temperature
- drying device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to a kind of temperature difference control type automatic drying device of electric machine, be applicable to that all kinds motor is moistureproof and dry.It is the bridge circuit that compares and measures of transducer that this device adopts thermistor, and use simple and easy amplifying circuit, unit such as pulse generating circuit, voltage-stabilized power supply circuit, controllable silicon noncontacting switch and device work monitoring circuit are formed machine system with it, and the motor temperature that is dried is controlled at all the time than in the higher temperature range of adjusting in advance of ambient temperature.
Description
The present invention relates to a kind of temperature difference control type automatic drying device of electric machine, be applicable to that all kinds motor is moistureproof and dry.
General known standby motor drying device adopts long-term mode of heating or fixes the discontinuous drying mode of a temperature spot.Adopt the device of the dry motor of this dual mode that many weak points are arranged, as: adopt the drying device of long-term mode of heating to drop into or excise, bring inconvenience to application by Artificial Control; Adopt the discontinuous drying device of fixed temperature point,,, waste energy because continuous heated condition appears in the ambient air temperature influence with contact control.Because this two classes drying device is operated under the full voltage, electric heater, switch contact life-span are shorter, have increased maintenance workload.
The objective of the invention is to design a kind of novel dried device, it is simple, rational in infrastructure to make it circuit.With low cost, debugging convenience, and have the function of controlling the temperature difference, so that remedy the deficiency of general known motor drying device.
The objective of the invention is to adopt following method to realize:
Adopting thermistor is the bridge circuit that compares and measures of transducer, and form machine system with it with unit such as simple and easy amplifying circuit, pulse generating circuit, voltage-stabilized power supply circuit, controllable silicon noncontacting switch and device work monitoring circuits, the motor temperature that is dried is controlled at all the time than in the high temperature range of adjusting in advance of ambient temperature.
Below with reference to accompanying drawing the present invention is described in further detail.
Fig. 1 is an electronic circuit schematic diagram of the present invention.
With reference to Fig. 1, this device is made up of differential temperature survey bridge A, voltage amplifier B, pulse generator C, pulse amplifier section power supply D, measurement bridge portion power supply D ', controllable silicon noncontacting switch E and load and supervisory signal unit F; Differential temperature survey bridge A is by resistance R 6, R7 and thermistor R
T, R '
T, potentiometer W and diode D5 form; R6, R7, R
T, R '
TConstitute temperature difference reference measurement brachium pontis, potentiometer W is for bridge arm balance adjustment (being that the temperature difference is adjusted).R
TBe loaded on the control circuit board R '
TBe loaded on the electric machine iron core position that is dried, both all are negative resistance charactertistic.Diode D5 works the reverse output violent change effect of bridge of measuring.Voltage amplifier B is made up of transistor BG3, BG2 and resistance R 3, R4, R5; After differential temperature survey bridge A output signal transistor BG3, BG2 amplified, the charging interval of control capacitor C1 was realized pulse advance or the hysteresis of pulse generator C.Pulse generator C is made up of capacitor C 1, unijunction transistor BG1, resistance R 2 and pulse transformer B2; When voltage amplifier B is subjected to the influence that defeated discharge signal changes and when causing transistor BG2 internal resistance to change, the capacitor C charging interval changes thereupon.When capacitor C was charged to unijunction transistor BG1 peak point voltage, internal resistance diminished suddenly between the emitter of transistor BG1 and base stage, and capacitor C produces trigger impulse to the pulse transformer discharge.Pulse amplifier section power supply D is made up of transformer B1, diode D1-D4 rectifier bridge, voltage regulation resistance R1 and voltage-stabiliser tube group YW1, measure bridge portion power supply D ' and be made up of diode D6-D9 rectifier bridge, voltage regulation resistance R8, voltage-stabiliser tube group YW2, controllable silicon noncontacting switch E replaces by controllable silicon KG1, KG2(or with single bidirectional triode thyristor SKG) form; Pulse transformer B2 secondary output signal control controllable silicon KG1, KG2(or SKG) for electric heater Rl voltage.Load and supervisory signal unit F are made up of electric heater Rl and signal lamp XD.
Complete machine operation principle of the present invention is as described below:
When the motor temperature that is dried equates with ambient temperature, between a of temperature survey bridge A and b point potential difference signal is arranged.This signal is sent into the transistor BG3 base stage of voltage amplifier B, make 1 charging interval of capacitor C leading through amplification, cause pulse generator C output pulse in advance, make the controllable silicon KG1 and the KG2 angle of flow leading, controllable silicon noncontacting switch E output rated voltage, electric heater Rl generates heat under rated voltage.Grow with time, the electric machine iron core temperature raises, temperature-sensitive element R '
TResistance reduces, and a is also corresponding with b point-to-point transmission potential difference to be reduced, and causes transistor BG3, BG2 internal resistance to increase, and 1 charging interval of capacitor C increases.Pulse generator C sends the hysteresis pulse, and the controllable silicon conduction angle is lagged behind, and causes controllable silicon noncontacting switch E output voltage to reduce electric heater R
LPower also decreases, in motor temperature is equilibrated at the temperature range of adjusting in advance, and electric heater R
LAlso be equilibrated in the desired power output area, the purpose that makes it A.T.C is achieved.
When motor put into operation, because motor heating itself, when making the iron core temperature surpass the temperature range of regulation, controllable silicon noncontacting switch E automatically shut down, and electric heater Rl stops heating.When the motor controllable silicon that is in operation punctures, or the present invention is when being miscarried into operation, and signal lamp XD is glittering, and signal gives the alarm.After motor was stopped transport, when the difference of motor temperature and ambient temperature was lower than the temperature range of adjusting in advance, the present invention put into operation automatically.The adjustment of temperature difference setting value realizes by the potentiometer W that regulates temperature survey bridge A.
The present invention has following characteristics:
Utilize temperature-sensitive element to be the benchmark comparing element of environment temperature with the device temperature that is dried, insert and measure in the bridge circuit, realize the temperature control system of temperature difference output rather than temperature output.
Adopt controllable silicon as the executive component of noncontacting switch and output voltage variation, realize that heater is in normal continuous small-power working method, energy savings.
Install the work supervisory signal additional at the heater two ends, make it to operate the operations staff and can at any time monitor or this machine of inspection working condition.
Can adjust the equipment of being dried and environment temperature as required and close controlling value.
Through test, the present invention debugs conveniently, and structure is more reasonable, has remedied the deficiency of general known motor drying device.
Claims (2)
1, a kind of temperature difference control type automatic drying device of electric machine that is applicable to that all kinds motor is moistureproof with dry is characterized in that: this device is made up of differential temperature survey bridge A, voltage amplifier B, pulse generator C, pulse amplifier section power supply D, measurement bridge portion power supply D ', controllable silicon noncontacting switch E and load and supervisory signal unit F; Differential temperature survey bridge A is made up of resistance R 6, R7 and thermistor RT, RT ', potentiometer W and diode D5; Voltage amplifier B is made up of transistor BG3, BG2 and resistance R 3, R4, R5; Pulse generator C is made up of capacitor C 1, unijunction transistor BG1, resistance R 2 and pulse transformer B2; Pulse amplifier section power supply D is made up of transformer B1, diode D1-D4 rectifier bridge, voltage regulation resistance R1 and voltage-stabiliser tube group YW1, measure bridge portion power supply D ' and be made up of diode D6-D9 rectifier bridge, voltage regulation resistance R8, voltage-stabiliser tube group YW2, controllable silicon noncontacting switch E is made up of controllable silicon KG1, KG2; Load and supervisory signal unit F are made up of electric heater RL and signal lamp XD.
2, automatic drying device of electric machine according to claim 1 is characterized in that: the controllable silicon noncontacting switch E of this device, available single bidirectional triode thyristor SKG replaces KG1 and KG2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106038 CN1053518A (en) | 1991-02-22 | 1991-02-22 | A kind of temperature difference control type automatic drying device of electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106038 CN1053518A (en) | 1991-02-22 | 1991-02-22 | A kind of temperature difference control type automatic drying device of electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1053518A true CN1053518A (en) | 1991-07-31 |
Family
ID=4907477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106038 Pending CN1053518A (en) | 1991-02-22 | 1991-02-22 | A kind of temperature difference control type automatic drying device of electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053518A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383313C (en) * | 2002-06-11 | 2008-04-23 | 乐金电子(天津)电器有限公司 | Drying controller and control method for drying machine |
| RU2446546C1 (en) * | 2011-02-15 | 2012-03-27 | Федеральное государственное образовательное учреждение высшего профессионального образования "Брянская государственная сельскохозяйственная академия" | Device to monitor resistance of insulation and dry windings of electric motor |
| CN103592970A (en) * | 2013-12-03 | 2014-02-19 | 山东中医药大学 | Humidity control system for Chinese medical herb pharmacy |
-
1991
- 1991-02-22 CN CN 91106038 patent/CN1053518A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383313C (en) * | 2002-06-11 | 2008-04-23 | 乐金电子(天津)电器有限公司 | Drying controller and control method for drying machine |
| RU2446546C1 (en) * | 2011-02-15 | 2012-03-27 | Федеральное государственное образовательное учреждение высшего профессионального образования "Брянская государственная сельскохозяйственная академия" | Device to monitor resistance of insulation and dry windings of electric motor |
| CN103592970A (en) * | 2013-12-03 | 2014-02-19 | 山东中医药大学 | Humidity control system for Chinese medical herb pharmacy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205755246U (en) | A kind of AC DC power module | |
| CN108507115A (en) | A kind of computer room or base station flood irrigation formula air-conditioning adaptive energy-saving control system and method | |
| CN219589193U (en) | Novel semiconductor refrigerator temperature control device | |
| CN1053518A (en) | A kind of temperature difference control type automatic drying device of electric machine | |
| CN211123804U (en) | Temperature interval control circuit and electronic equipment | |
| CN207879647U (en) | A kind of permanent air quantity blower fan applied to wall-hung boiler | |
| CN109185212A (en) | A kind of DC fan alignment circuit | |
| CN2356341Y (en) | Dynamic detector for infrared shaft temperature testing device | |
| CN210781868U (en) | Radiating circuit automatically controlled by excitation silicon controlled module | |
| CN209978521U (en) | Controller of solar heat pump drying system | |
| CN107589327A (en) | A kind of detection means of fan of frequency converter failure | |
| CN214850501U (en) | Intelligent variable load type phase advancer | |
| CN2318787Y (en) | Multifunction temp. controller for electric blanket | |
| CN212433386U (en) | Alternating current transformer detection device | |
| CN111271311B (en) | Control device for preventing electric fan from being too cold | |
| CN214307854U (en) | Automatic water temperature control device of energy-saving constant humidity machine | |
| CN2132321Y (en) | Overtemperature protector for motor | |
| CN2058980U (en) | Temp. measuring box | |
| CN205243892U (en) | Electrodeless adjusting device that makes an uproar that falls of full -automatic pullup resistor | |
| CN211977172U (en) | Variable air volume end device with air supply cold and heat metering function | |
| CN217510686U (en) | Medical air cooler and power control circuit thereof | |
| CN2169716Y (en) | Controller for temp. difference control air exchanger | |
| CN2137864Y (en) | Automatic controlled temp rgulator | |
| CN209643872U (en) | A kind of electronic cigarette | |
| CN205689474U (en) | Radiator fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |