CN204652273U - Generator low temperature excitation unit - Google Patents
Generator low temperature excitation unit Download PDFInfo
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- CN204652273U CN204652273U CN201520100376.XU CN201520100376U CN204652273U CN 204652273 U CN204652273 U CN 204652273U CN 201520100376 U CN201520100376 U CN 201520100376U CN 204652273 U CN204652273 U CN 204652273U
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Abstract
The utility model discloses a kind of generator low temperature excitation unit, belong to electrical generator fields, comprise an additional magnetizing exciter, this magnetizing exciter comprises narrow big current excitation pulse circuit for generating, and the positive source terminals to be connected with this circuit, power cathode terminals, actuating motor adds electro-detection terminals, pulse output and electrical power generators detect time-sharing multiplex terminals, positive source terminals connect key switch power output end, power cathode terminals connect battery terminal negative, described narrow big current excitation pulse circuit for generating is primarily of single chip circuit, actuating motor adds power detection circuit, electrical power generators detects and forms with pulse output switching circuit.The duty ratio of the utility model additional excitation device excitation pulse is little, and pulse is short for effective acting time, reduces battery consumption and coil heating, improves battery and generator useful life.
Description
Technical field
The utility model relates to a kind of generator low temperature excitation unit, belongs to electrical generator fields.
Background technology
Automobile current generator is the power supply of vehicle electrical systems, drives electrical power generators by automobile engine by belt transmission, mechanical energy is converted to electric energy and exports.
Current vehicle uses maximum generators for silicon rectification generator, there is the advantages such as volume is little, power large, output voltage stabilization.What silicon rectification generator Inside coil produced is alternating current, is converted to Rectified alternating current by one group of silicon rectification bridge, and for keeping output voltage stabilization, generator is all furnished with voltage regulator.Its operation principle is: detect generator output voltage, if voltage is high, reduces exciting current; If the low increase exciting current of voltage.At present on vehicle, the method of initial excitation is provided to be that 24V supply voltage is supplied to generator voltage controller after resistance (charging indicator light) current limliting about 200 Europe to generator, because now generator does not generate electricity, voltage regulator conduction voltage drop is little, output voltage is high, and therefore input voltage substantially all acts on magnet exciting coil.If there is no the resistance current limliting about 200 Europe, will cause 24V supply voltage long duration of action on magnet exciting coil, coil can be caused overheated on the one hand, shorten the life-span; Storage battery electricity can be consumed on the other hand, affect complete machine and normally work.
After electrical power generators, directly powered to voltage regulator by internal body diodes, now voltage regulator regulates conduction voltage drop according to output voltage.Because rectifier bridge/diode and voltage regulator are all semiconductor device, it is influenced by ambient temperature very large that its PN saves drooping characteristic, and temperature is lower, and pressure drop is larger.
In the winter time, because ambient temperature is low, the pressure drop of rectifier bridge/diode and voltage regulator all increases considerably, and the resistance of its correspondence is also greatly increased, and the closed loop gain of whole coil greatly reduces.When after vehicle launch, because loop gain is too low, cannot positive feedback be formed, thus coil cannot be made to produce the voltage meeting amplitude requirement, therefore cause generator can not build Hair Fixer electricity.And once after generating, generator just can be in stable operating state.
Existing rectifier bridge, adjuster all adopt semiconductor fabrication due to technical requirement, and therefore cannot avoid the pressure drop of low temperature PN joint increases the problem brought.
Utility model content
The utility model technical issues that need to address are to provide one in the winter time under low temperature environment, and automobile current generator normally builds Hair Fixer electricity, do not affect generator low temperature exciting method and device that vehicle normally uses.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of generator low temperature excitation unit, comprise existing rotor machine, this device is the silicon rectification generator of built-in voltage adjuster, and a set ofly provide the additional magnetizing exciter of excitation pulse for this dynamo field coil, this magnetizing exciter comprises narrow big current excitation pulse circuit for generating, and the positive source terminals to be connected with this narrow big current excitation pulse circuit for generating, power cathode terminals, actuating motor adds electro-detection terminals, pulse output and electrical power generators detect time-sharing multiplex terminals, wherein actuating motor adds the start end 50 that electro-detection terminals connect actuating motor, pulse output and electrical power generators detect time-sharing multiplex terminals and are connected silicon rectification generator output D+, positive source terminals connect key switch power output end 58, power cathode terminals connect battery terminal negative 31, described narrow big current excitation pulse circuit for generating is primarily of single chip circuit, actuating motor adds power detection circuit, electrical power generators detects and forms with pulse output switching circuit,
Described actuating motor adds power detection circuit and comprises divider resistance R1, R2, is connected between the start end 50 of actuating motor and battery terminal negative 31 after divider resistance R1, R2 series connection, and the node of divider resistance R1, R2 connects CPU input.
Described electrical power generators detects and comprises generator output voltage testing circuit and pulse output switching circuit with pulse output switching circuit, described generator output voltage testing circuit comprises divider resistance R3, R4, be connected between generator output end D+ and battery terminal negative 31 after divider resistance R3, R4 series connection, the node of divider resistance R3, R4 connects CPU input, described pulse output switching circuit comprises resistance R5, triode Q1, solid-state relay J1, wherein the output of CPU is through the base stage of resistance R5 connecting triode Q1, the emitter of triode Q1 connects battery terminal negative 31, the collector electrode of triode Q1 connects a control end of solid-state relay J1, another of solid-state relay J1 controls termination key switch power output end 58, the NO termination key switch power output end 58 of solid-state relay J1, the COM termination generator output end D+ of solid-state relay J1, the start end 50 of the NC termination actuating motor of solid-state relay J1, the output signal of CPU controls triode Q1 conducting or shutoff through resistance R5, thus control the output of solid-state relay J1, realize narrow big current excitation pulse to export, and whether have voltage at inter-train pause detection generator output end D+.
Owing to have employed technique scheme, the technological progress that the utility model obtains is: the utility model is by additional excitation device, additional excitation device does not need to change generator (built-in voltage adjuster) and entire automobile electric system, when generator normally can not build pressure, narrow big current excitation pulse is provided to engine magnet exciting coil, the closed loop of whole generator is made to set up positive feedback, Hair Fixer electricity is built in realization, improve the reliability that Hair Fixer electricity built by occurs at low temperatures motor, and generator useful life and storage battery electricity are almost had no effect; The duty ratio of additional excitation device excitation pulse is little, and pulse is short for effective acting time, reduces battery consumption and coil heating, improves battery and generator useful life.
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of prior art;
Fig. 2 is the electrical schematic diagram after the utility model addition of excitation unit;
Fig. 3 is the utility model excitation unit electrical schematic diagram;
Fig. 4 is the utility model pulsed field magnetization device program flow diagram.
Embodiment
Below in conjunction with embodiment, the utility model is described in further details:
The utility model is a kind of generator low temperature excitation unit, and solve in the winter time under low temperature condition, because generator can not set up voltage, generator does not generate electricity, and causes the problem that vehicle can not normally use.
A kind of generator low temperature excitation, based on existing Blast Furnace Top Gas Recovery Turbine Unit (TRT) (silicon rectification generator, the electrical schematic diagram of existing Blast Furnace Top Gas Recovery Turbine Unit (TRT) as shown in Figure 1), when not to generator (built-in voltage adjuster) and entire automobile electric system is changed, set of excitation device (adding the electrical schematic diagram after excitation unit as shown in Figure 2) is increased to dynamo field coil, this device is when generator normally can not build Hair Fixer electricity, within a certain period of time, narrow big current excitation pulse is provided to magnet exciting coil, the closed loop of whole generator is made to set up positive feedback, Hair Fixer electricity is built in realization, wherein the time of excitation pulse is provided to be to magnet exciting coil: from engine start, by detecting generator voltage output D+(self-excitation feeder ear) voltage, if Hair Fixer electricity do not built by generator, narrow big current excitation pulse is just provided, once detect that generator starts generating and (starts to generate electricity, be less than 2 minutes) or accumulative excitation time reach 2 minutes, just stop providing narrow big current excitation pulse.In order to reduce the consumption of storage battery and avoid the long-time heating power of coil, reduce useful life, lower the duty ratio of narrow big current excitation pulse, for best when its duty ratio is 1:6.
As shown in Figure 3, this device comprises a set ofly provides the additional magnetizing exciter of excitation pulse for silicon rectification generator magnet exciting coil, this magnetizing exciter comprises narrow big current excitation pulse circuit for generating, and the positive source terminals to be connected with this narrow big current excitation pulse circuit for generating, power cathode terminals, actuating motor adds electro-detection terminals, pulse output and electrical power generators detect time-sharing multiplex terminals, wherein actuating motor adds the start end 50 that electro-detection terminals connect actuating motor, pulse output and electrical power generators detect time-sharing multiplex terminals and are connected silicon rectification generator output D+, positive source terminals connect key switch power output end 58, power cathode terminals connect battery terminal negative 31, described narrow big current excitation pulse circuit for generating is primarily of single-chip microcomputer (CPU) circuit, actuating motor adds power detection circuit, electrical power generators detects and forms with pulse output switching circuit, wherein actuating motor adds power detection circuit and electrical power generators and detects and all adopt level detection mode with the electrical power generators test section in pulse output switching circuit, electrical power generators detects and adopts big current high frequency solid state relay to provide narrow big current excitation pulse to magnet exciting coil with the pulse output switching part in pulse output switching circuit.
Described actuating motor adds power detection circuit and utilizes bleeder circuit to realize, comprise divider resistance R1, R2, be connected between the start end 50 of actuating motor and battery terminal negative 31 after divider resistance R1, R2 series connection, the node of divider resistance R1, R2 connects CPU input, after dividing potential drop, realized by the voltage level detected on resistance R2.
Described electrical power generators detects and comprises generator output voltage testing circuit and pulse output switching circuit with pulse output switching circuit, described generator output voltage testing circuit comprises divider resistance R3, R4, be connected between generator output end D+ and battery terminal negative 31 after divider resistance R3, R4 series connection, the node of divider resistance R3, R4 connects CPU input, after dividing potential drop, realized by the voltage level detected on resistance R4, described pulse output switching circuit comprises resistance R5, triode Q1, solid-state relay J1, wherein the output of CPU is through the base stage of resistance R5 connecting triode Q1, the emitter of triode Q1 connects battery terminal negative 31, the collector electrode of triode Q1 connects a control end of solid-state relay J1, another of solid-state relay J1 controls termination key switch power output end 58, the NO termination key switch power output end 58 of solid-state relay J1, the COM termination generator output end D+ of solid-state relay J1, the start end 50 of the NC termination actuating motor of solid-state relay J1, the output signal of CPU controls triode Q1 conducting or shutoff through resistance R5, thus control the output of solid-state relay J1, realize narrow big current excitation pulse to export, and whether have voltage at inter-train pause detection generator output end D+.Described solid-state relay J1 is big current high frequency solid state relay, and output is one often open one normally closed, and COM end is by often opening one end and normally closed one end is formed by connecting.
Operation principle
After powering on, by the start end 50 detecting actuating motor, single-chip microcomputer judges whether engine starts to start, once detect that start end 50 has voltage signal, illustrate that engine starts to start, wait for that 1s(waits for that engine speed is increased to starting speed) after, start the voltage detecting generator output end D+, if D+ holds no-voltage, then pressure do not built by generator, start to hold output excitation pulse in time-sharing multiplex mode to generator D+, whether simultaneously during output gap, detecting generator D+ end has voltage to produce.Once detect that generator D+ end has+24V (pressure self-excitation built by generator), or accumulative excitation time reaches 2 minutes, just stops exporting excitation pulse, exits excitation flow process.Its program flow diagram as shown in Figure 4.
Claims (3)
1. a generator low temperature excitation unit, comprise the silicon rectification generator of built-in voltage adjuster, it is characterized in that: also comprise an additional magnetizing exciter, this magnetizing exciter comprises narrow big current excitation pulse circuit for generating, and the positive source terminals to be connected with this circuit, power cathode terminals, actuating motor adds electro-detection terminals, pulse output and electrical power generators detect time-sharing multiplex terminals, wherein actuating motor adds the start end (50) that electro-detection terminals connect actuating motor, pulse output and electrical power generators detect time-sharing multiplex terminals and are connected silicon rectification generator output (D+), positive source terminals connect key switch power output end (58), power cathode terminals connect battery terminal negative (31), described narrow big current excitation pulse circuit for generating is primarily of single chip circuit, actuating motor adds power detection circuit, electrical power generators detects and forms with pulse output switching circuit.
2. generator low temperature excitation unit according to claim 1, it is characterized in that described actuating motor adds power detection circuit and comprises divider resistance R1, R2, be connected between the start end (50) of actuating motor and battery terminal negative (31) after divider resistance R1, R2 series connection, the node of divider resistance R1, R2 connects CPU input.
3. generator low temperature excitation unit according to claim 1, it is characterized in that described electrical power generators detects and comprise generator output voltage testing circuit and pulse output switching circuit with pulse output switching circuit, described generator output voltage testing circuit comprises divider resistance R3, R4, be connected between generator output end (D+) and battery terminal negative (31) after divider resistance R3, R4 series connection, the node of divider resistance R3, R4 connects CPU input, described pulse output switching circuit comprises resistance R5, triode Q1, solid-state relay J1, wherein the output of CPU is through the base stage of resistance R5 connecting triode Q1, the emitter of triode Q1 connects battery terminal negative (31), the collector electrode of triode Q1 connects a control end of solid-state relay J1, another of solid-state relay J1 controls termination key switch power output end (58), NO termination key switch power output end (58) of solid-state relay J1, the COM termination generator output end (D+) of solid-state relay J1, the start end (50) of the NC termination actuating motor of solid-state relay J1, the output signal of CPU controls triode Q1 conducting or shutoff through resistance R5, thus control the output of solid-state relay J1, realize narrow big current excitation pulse to export, and whether have voltage at inter-train pause detection generator output end (D+).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100376.XU CN204652273U (en) | 2015-02-12 | 2015-02-12 | Generator low temperature excitation unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100376.XU CN204652273U (en) | 2015-02-12 | 2015-02-12 | Generator low temperature excitation unit |
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| Publication Number | Publication Date |
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| CN204652273U true CN204652273U (en) | 2015-09-16 |
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| CN201520100376.XU Active CN204652273U (en) | 2015-02-12 | 2015-02-12 | Generator low temperature excitation unit |
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| CN (1) | CN204652273U (en) |
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2015
- 2015-02-12 CN CN201520100376.XU patent/CN204652273U/en active Active
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