CN208158433U - Isolated power supply module of railway locomotive vehicle electronic device - Google Patents

Abstract

The utility model provides a kind of isolated power supply module of railway locomotive vehicle electronic device, the power module uses quasi-resonance counter exciting synchronous rectification Technical Architecture, and the radiator of the power module is divided into the radiator I positioned at transformer primary and the radiator II positioned at transformer secondary；Power MOSFET tube in the pwm control circuit uses overall plastic seal structure, is installed on radiator I, the synchronous rectification plate is installed on radiator II；The mainboard is laid out using double-sided device, the top layer of the mainboard, the higher device of mounting height, the bottom of the mainboard, installs low clearance surface mounting component.Input power MOSFET and output synchronous rectification plate use independent radiator respectively, and insulation distance between the two is big.Reduce the common mode interference between input and output, the voltage stabilization end of input power MOSFET pipe and radiator are direct-connected, and the voltage stabilization end of output synchronous rectifier and another radiator are direct-connected, eliminate power device and are transmitted to the common mode interference on radiator.

Description

Isolated power supply module of railway locomotive vehicle electronic device

Technical field

The utility model relates to the isolated power supply modules that a kind of railway locomotive vehicle electronic device uses, more particularly to It is a kind of to need wide input voltage range, wide operating temperature range and good Electro Magnetic Compatibility（EMC）Performance, highly reliable application iron Isolated power supply module of road locomotive vehicle-mounted electronic equipment.

Background technique

DC110V DC power supply in railway locomotive electric circumstance, interference is more, and voltage change is big；And railway locomotive environment temperature Greatly, altitude change is big, has a significant impact to railway locomotive vehicle electronic device stable operation for degree, humidity range variation.It is required that straight Junction must be reliable, stable to an isolated power supply of railway locomotive DC110V DC power supply, reduces Electronic locomotive equipment fault Incidence.And the isolated power supply module that current rail locomotive vehicle-mounted electronic equipment uses, in wide DC110V input voltage model It encloses, wide operating temperature range, high insulating property and good Electro Magnetic Compatibility (EMC) or high efficiency, reliability etc., it cannot It takes into account comprehensively.

The utility model relates to a kind of isolated power supply module of railway locomotive vehicle electronic device, railway machine can be improved The stability of vehicle vehicle electronic device operation, and then ensure railway operation safety and improve driving efficiency, society with higher Benefit and economic benefit.

Utility model content

To solve the above problems, providing a kind of isolated power supply module of railway locomotive vehicle electronic device, takes into account and expire Demand of the foot in terms of these, can further improve the stability of railway locomotive vehicle electronic device operation, and then ensure railway Traffic safety and raising driving efficiency.

The purpose of this utility model is realized in the following manner：

A kind of isolated power supply module of railway locomotive vehicle electronic device, the power module use quasi-resonance flyback Synchronous rectification framework, including radiator, transformer and the input filter electricity being sequentially connected in series positioned at transformer primary Road, pwm power translation circuit and the circuit of synchronous rectification being sequentially connected in series positioned at transformer secondary, output filter circuit, it is described Pwm power translation circuit also pass through one pwm control circuit of auxiliary power supply circuit connection, the output of the output filter circuit End is also connected with the input terminal of synchronous commutating control circuit, and the output end of synchronous commutating control circuit is connected to circuit of synchronous rectification； The output end of the output filter circuit of the transformer secondary is also connected with a feed circuit, and the output end of the feed circuit connects It is connected to pwm control circuit, the circuit board of the power module is divided into mainboard and synchronous rectification plate, on the synchronous rectification plate Including circuit of synchronous rectification and synchronous commutating control circuit, remaining foregoing circuit, transformer and radiator are arranged on mainboard； The radiator of the power module is divided into positioned at the radiator I of transformer primary and positioned at the radiator of transformer secondary Ⅱ；Power MOSFET tube in the pwm control circuit uses overall plastic seal structure, is installed on radiator I, described is same Step cowling panel is installed on radiator II；The mainboard using double-sided device be laid out, the top layer of the mainboard, mounting height compared with High device, the bottom of the mainboard install low clearance surface mounting component.

The higher device of the height includes power MOSFET, synchronous rectification plate, radiator, filter capacitor and transformer.

The low clearance surface mounting component includes PWM controller, resistance, capacitor, and element height is no more than 2.54mm.

The Transformer Selection has the PQ series magnetic core of larger Ae value and Aw value.

The synchronous rectification plate, the two-sided epoxy resin bonded fiber of use, copper is covered at the back side；The synchronous rectification plate and mainboard are logical Three pins are crossed to be connected, with being separately connected mainboard output voltage, transformer output winding 11,12 pins on mainboard, on mainboard Transformer exports winding 7,8 pins.

The radiator I positioned at transformer primary is directly connected to power module DC110V input, is located at transformation The radiator II of device primary side is born with power module output and is directly connected to, and radiator plays electromagnetic shielding action, and EMI is small.

The mainboard of the power module circuitry plate uses at least 4 layers of epoxy resin bonded fiber, the two-sided layout of device, interior electricity Layer for input DC110V and output ground, high-voltage line, high current line cabling above and below internal planes.

The power module uses Open architecture, and the heat that power module generates directly radiates to ambient enviroment.

The nearest external 5 face body shielding cases of the power module, the 5 face body shielding case, which can be opened, to be less than or equal to 0.5mm through-hole, the heat that power module generates are shed by these ventilation holes into ambient air.

Distant control function circuit and protection circuit are also connected on the pwm control circuit；Also connect on the feed circuit It is connected to output voltage regulation circuit.

The beneficial effects of the utility model are：1）In terms of insulation performance, input power MOSFET and output synchronous rectification plate Independent radiator is used respectively, and insulation distance between the two is big.Output feedback and output voltage protection directly adopt patch optocoupler It is isolated with input, realizes the complete electrical isolation of input and output；

2）In terms of electromagnetic compatibility, using NCP1337 flyback quasi-resonance technology, realization is minimum in the drain-source voltage of MOSFET pipe Point switch MOSFET pipe, reduces current spike when MOSFET pipe switch, reduces electromagnetic interference accordingly；Input power MOSFET Pipe and synchronous rectification plate use separated radiator respectively, reduce the common mode interference between input and output；Transformer winding is non- Voltage swing winding technique is equivalent to one layer of shielded layer in transformer outer layer, reduces transformer electromagnetic interference to external radiation；Input The voltage stabilization end of power MOSFET tube and radiator are direct-connected, and the voltage stabilization end of output synchronous rectifier and another radiator are straight Even, it eliminates power device and is transmitted to the common mode interference on radiator；

3）Heat dissipation aspect, the voltage stabilization end of power device is direct-connected with radiator, eliminate radiator and power device it Between insulating heat-conductive piece, improve capacity of heat transmission, increase heat-sinking capability.

Detailed description of the invention

Fig. 1 is flyback quasi-resonance synchronous rectification architecture diagram.

Resonant operational schematic diagram subject to Fig. 2.

Fig. 3 is that NCP1337 realizes quasi-resonance basic circuit diagram.

Fig. 4 is synchronous commutating control circuit figure.

Fig. 5 is a kind of synchronous rectification control panel figure.

Fig. 6 is another synchronous rectification control panel figure.

Fig. 7 is that ultra-wide DC110V electrical locomotive power voltage input detects temperature-compensation circuit figure.

Fig. 8 is the first power module top level diagram.

Fig. 9 is second of power module top level diagram.

Figure 10 is the first power module bottom figure.

Figure 11 is second of power module bottom figure.

Figure 12 is the utility model power module electrical schematic diagram.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

A kind of isolated power supply module of railway locomotive vehicle electronic device, railway locomotive DC110V power supply are defeated by module Incoming interface is exported after inside modules circuit carries out pressure stabilizing isolated variable by output interface, realizes railway locomotive DC110VDC power supply wide input voltage range, ultra-wide operating temperature range, high efficiency pressure stabilizing and low EMI（EMI）Isolation becomes It changes.

The principle of quasi-resonance transformation is to reduce the switching loss of switching tube in topology.Chip is controlled using NCP1337, is realized There can be efficient performance under standby and operating mode.Unloaded or at light load standby, NCP1337 uses jump period skill Art control peak point current simultaneously removes some switching pulses, so that control switch is lost, realizes high energy efficiency.In the operational mode, lead to It crosses coil and removes Magnetic testi, accurate detection goes out voltage the lowest point, realizes the switch of quasi-resonance, reduces loss, improves efficiency.Specifically Basic circuit it is as shown in Fig. 3.Electricity is sampled in the input voltage of the control chip NCP1337 of power module transformer primary Lu Zhong, concatenate zener diode, carry out temperature-compensating, make power module accurately sampled in -25 DEG C~+85 DEG C 30VDC~ Railway locomotive DC110V supply voltage in 240VDC variation range.

Synchronous commutating control circuit not only can effectively be detected current zero-crossing point, be using control chip NCP4305 Synchronous rectification MOSFET provides timing appropriate driving signal.Minimum conducting and minimum turn-off time, Jin Erping can also be set Cover the noise as caused by synchronous rectifier turn-on and turn-off moment.Due to ghost effect, moment meeting is connected in synchronous MOSFET pipe Generate voltage noise.The smallest turn-on time setting will avoid comparator from mistakenly turning off synchronous MOSFET pipe.Synchronous MOSFET Pipe shutdown moment can generate voltage noise, and generate oscillation in the demagnetization phase of DCM.The minimum turn-off time can shield noise simultaneously Prevent synchronous MOSFET pipe mistakenly open-minded.Specific synchronous commutating control circuit is as shown in Fig. 4.

As shown in Figure 1, a kind of isolated power supply module of railway locomotive vehicle electronic device, the power module is used Quasi-resonance counter exciting synchronous rectification Technical Architecture is sequentially connected in series defeated including radiator, transformer and positioned at transformer primary Enter filter circuit, pwm power translation circuit and the circuit of synchronous rectification being sequentially connected in series positioned at transformer secondary, output filtering Circuit, the pwm power translation circuit also pass through one pwm control circuit of auxiliary power supply circuit connection, the output filtering The output end of circuit is also connected with the input terminal of synchronous commutating control circuit, and the output end of synchronous commutating control circuit is connected to synchronization Rectification circuit；The output end of the output filter circuit of the transformer secondary is also connected with a feed circuit, the feed circuit Output end be connected to pwm control circuit, the circuit board of the power module is divided into mainboard and synchronous rectification plate, and described is same Walking includes circuit of synchronous rectification and synchronous commutating control circuit on cowling panel, remaining foregoing circuit, transformer and radiator are uniformly distributed It sets on mainboard；The radiator of the power module is divided into positioned at the radiator I of transformer primary and positioned at transformer The radiator II of grade side；Power MOSFET tube in the pwm control circuit uses overall plastic seal structure, is installed on radiator I On, the synchronous rectification plate is installed on radiator II；The mainboard is laid out using double-sided device, the top of the mainboard Layer, the higher device of mounting height, the bottom of the mainboard install low clearance surface mounting component.

The higher device of the height includes power MOSFET, synchronous rectification plate, radiator, filter capacitor and transformer.

The low clearance surface mounting component includes PWM controller, resistance, capacitor, and element height is no more than 2.54mm.

The Transformer Selection has larger Ae value（Magnetic core effective sectional area）With the PQ system of Aw value (magnetic core window area) Column magnetic core, can be around more Multiple coil under same volume, and transformer efficiency density is high, realize to meet in broader input voltage range and want It asks, more large power supply can be done.Meanwhile leakage field is less, EMI is smaller, and energy loss is few, high-efficient.Transformer winding is designing When, the magnetic core and window area of transformer are made full use of, the current density of calculating transformer primary side winding and vice-side winding is accomplished Maximum utilizes window area, obtains the smallest current density, reduces transformer winding fever.Meanwhile voltage swing winding technique In internal layer, non-voltage swing winding technique is equivalent to shielded layer, subtracts in transformer outer layer, voltage stabilization winding outermost in this way Few transformer electromagnetic interference.

The wide input voltage range（30V~240V）And (input voltage highest can for superpower anti-input overvoltage capabilities It works to 270V, until 330VDC is not damaged).To input voltage by electric resistance partial pressure, voltage division signal is passed to NCP1337 chip 1 foot.The level on lower 1 foot of chip is worked normally by monitoring, when level is lower than 500 mV on pin 1, controller will stop Pulse output, forms under-voltage protection；When level is greater than 3V on pin 1, controller will turn off pulse output, form over-voltage and protect Shield.The input voltage range formed in this way, maximum voltage are preferably at most 6 times of minimum voltage.But the overvoltage/undervoltage being formed by is protected Shield, is not able to satisfy the ultra-wide input range of 30V-240V.By while series resistance divides, series diode, such as attached drawing 7, using voltage drop-temperature characterisitic when diode current flow, be equivalent to different input voltages and at a temperature of show different size Resistance value realize that the input of super wide voltage accurately detects to realize 9 times of input characteristics that maximum voltage is minimum voltage Ability.

The synchronous rectification plate, using 1mm（Or other plate thickness）Dual platen（Or multi-layer board）Epoxy resin bonded fiber, back It covers copper and is electrically connected with output ground, radiator in face；The synchronous rectification plate is connected with mainboard by three pins, is connected respectively With connecing mainboard output voltage, transformer output winding 11 on mainboard, 12 pins, transformer exports winding 7,8 pins on mainboard, The device that synchronous rectification plate directly treats as three pins is installed on a heat sink, easy for installation simple, while enhancing heat dissipation, is subtracted The electromagnetic interference that small synchronous rectification generates.Specific circuit of synchronous rectification plate is as shown in attached drawing 5 and attached drawing 6.

The radiator I positioned at transformer primary is directly connected to power module DC110V input, is located at transformation The radiator II of device primary side is born with power module output and is directly connected to, and radiator plays electromagnetic shielding action, and EMI is small.

The mainboard of the power module circuitry plate uses at least 4 layers of epoxy resin bonded fiber, the two-sided layout of device, interior electricity Layer for input DC110V and output ground, high-voltage line, high current line cabling above and below internal planes.

The power module uses Open architecture, and the heat that power module generates directly radiates to ambient enviroment.

The nearest external 5 face body shielding cases of the power module, can further decrease the external electromagnetism spoke of power module Harassing and wrecking are penetrated, the 5 face body shielding case can be opened less than or equal to 0.5mm through-hole, and the heat that power module generates is divulged information by these Hole sheds into ambient air, meanwhile, heat-conduction insulation spacer is installed between shielding case and transformer, generates transformer Heat（The partial heat generated including power module other devices）It is radiated by shielding case.

Distant control function circuit and protection circuit are also connected on the pwm control circuit；Also connect on the feed circuit It is connected to 1 output voltage regulation circuit.

The power module, can be by replacing a few component of module on the same printed circuit board, can be real The power supply output of existing different voltages grade and power, is convenient for extension design；Power module circuitry plate is more using 4 layers or more Layer epoxy resin bonded fiber, the two-sided layout of device, internal planes be input DC110V and output ground, including high-voltage line, high current line Downward cabling in electric layer walks short-term and thick line as far as possible, and EMI is small while improving heat-sinking capability；Power module circuitry plate is using two-sided Device layout reduces power module height.Electric insulation distance is more than or equal to 2.54mm between power module circuitry plate primary and secondary, Guarantee power module output and input between insulation performance, insulation pressure resistance be more than or equal to 2KVAC/1min, adapt to High aititude gas Wait environment；Power module circuitry plate carries out three proofings processing, to improve the environmental suitability of power module；Power module is using opening Formula structure, the heat that power module generates directly radiate to ambient enviroment, and no intermediate heat conducts link, and power module and surrounding are empty Thermal resistance is small between compression ring border.Specifically as shown in attached drawing 8, attached drawing 9, attached drawing 10 and attached drawing 11.

Physical circuit design such as attached drawing 12, structure design the two knot as shown in attached drawing 8, attached drawing 9, attached drawing 10 and attached drawing 11 Conjunction can produce corresponding power module.For the power module of identical output power but different output voltages, can be used identical Circuit board, it is only necessary to transformation depressor, feedback resistance, filter capacitor etc. minority devices can realize；For different output works The power module of rate but identical output voltage, electrical principle is almost the same, and by sampling resistor, the replacements such as transformer, circuit board are Can meet demand, as including but not limited to 2 kinds of power modules as shown in attached drawing 8, attached drawing 9, attached drawing 10 and attached drawing 11.To Standardization, the seriation, Miniaturization Design for realizing single topological circuit, a small number of circuit boards, save design, technique, production, material Etc. costs.

Above-described is only preferred embodiments of the present invention, it is noted that for those skilled in the art For, under the premise of not departing from the utility model general idea, several changes and improvements can also be made, these also should be considered as The protection scope of the utility model.

Claims (8)

1. a kind of isolated power supply module of railway locomotive vehicle electronic device, the power module is same using quasi-resonance flyback Walk commutation technique framework, including radiator, transformer and the input filter circuit being sequentially connected in series positioned at transformer primary, Pwm power translation circuit and the circuit of synchronous rectification being sequentially connected in series positioned at transformer secondary, output filter circuit, it is described Pwm power translation circuit also passes through one pwm control circuit of auxiliary power supply circuit connection, the output end of the output filter circuit It is also connected with the input terminal of synchronous commutating control circuit, the output end of synchronous commutating control circuit is connected to circuit of synchronous rectification；Institute The output end for stating the output filter circuit of transformer secondary is also connected with a feed circuit, the output end connection of the feed circuit To pwm control circuit, it is characterised in that：The circuit board of the power module is divided into mainboard and synchronous rectification plate, and described is same Walking includes circuit of synchronous rectification and synchronous commutating control circuit on cowling panel, remaining foregoing circuit, transformer and radiator are uniformly distributed It sets on mainboard；The radiator of the power module is divided into positioned at the radiator I of transformer primary and positioned at transformer The radiator II of grade side；Power MOSFET tube in the pwm control circuit uses overall plastic seal structure, is installed on radiator I On, the synchronous rectification plate is installed on radiator II；The mainboard is laid out using double-sided device, the top of the mainboard Layer, the higher device of mounting height, the bottom of the mainboard install low clearance surface mounting component；

The higher device of the height includes power MOSFET, synchronous rectification plate, radiator, filter capacitor and transformer；

The low clearance surface mounting component includes PWM controller, resistance, capacitor, and element height is no more than 2.54mm.

2. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：The change Depressor is selected under same volume, the PQ series magnetic core with larger Ae value and Aw value.

3. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：It is described same Cowling panel is walked, the two-sided epoxy resin bonded fiber of use, copper is covered at the back side；The synchronous rectification plate is connected with mainboard by three pins It connects, with being separately connected mainboard output voltage, transformer output winding 11 on mainboard, 12 pins, transformer exports winding on mainboard 7,8 pin.

4. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：Institute's rheme It is directly connected to inputting in the radiator I and power module DC110V of transformer primary, positioned at the heat dissipation of transformer secondary Device II is born with power module output and is directly connected to, and radiator plays electromagnetic shielding action, and EMI is small.

5. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：The electricity The mainboard of source module circuit board uses at least 4 layers of epoxy resin bonded fiber, the two-sided layout of device, and internal planes are input DC110V Ground and output ground, high-voltage line, high current line cabling above and below internal planes.

6. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：The electricity Source module uses Open architecture, and the heat that power module generates directly radiates to ambient enviroment.

7. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：The electricity Source module nearby open less than or equal to 0.5mm through-hole by an external 5 face body shielding cases, the 5 face body shielding case, and power module generates Heat shed by these ventilation holes into ambient air.

8. isolated power supply module of railway locomotive vehicle electronic device as described in claim 1, it is characterised in that：It is described Distant control function circuit and protection circuit are also connected on pwm control circuit；Output voltage is also connected on the feed circuit Adjust circuit.