CN208226893U - A kind of supply convertor of high-speed permanent magnetic starter-generator - Google Patents
A kind of supply convertor of high-speed permanent magnetic starter-generator Download PDFInfo
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Abstract
A kind of supply convertor of high-speed permanent magnetic starter-generator provided by the utility model, including current detection circuit, SiC device control the phased full-bridge of full-bridge, SCR device, switching circuit, voltage detecting circuit and control circuit entirely；Generator output electric frequency is improved to 1~2kHz, the weight of starter-generator system can be significantly reduced；The engine speed range being suitable for is also wider；Used boost-buck power converter topology structure is higher than the armature winding voltage high pressure of starter-generator using winding voltage corresponding to full control full-bridge boost topology, can effectively reduce winding current, increase the realizability of machine winding；Itself synchronous inductance of starter-generator can be increased, it is no longer necessary to add the big inductance of auxiliary again in supply convertor, and reduce three-phase fully-controlled full-bridge injection motor high frequency ripple current bring added losses；Work in the power device in supply convertor near DC bus-bar voltage, the requirement of operating voltage and electric current to power device is more mild.
Description
Technical field
The utility model relates to a kind of supply convertors of high-speed permanent magnetic starter-generator.
Background technique
The supply convertor of starter-generator is a kind of supply convertor being used cooperatively with starter-generator.Starting-generating
Machine can time-sharing work in it is electronic and power generation two states, have the function of dual-use.When starter-generator works in motoring condition,
For supply convertor as driving source, energy first flows to starter-generator by supply convertor, then is turned electric energy by starter-generator
Mechanical energy is turned to, engine is driven；Supply convertor makes engine by zero speed by carrying out direct torque to starter-generator
Rise to normal self-stabilization working speed.When starter-generator works in generating state, engine is first passed through as source motivation, energy
It crosses starter-generator and converts AC energy for mechanical energy, convert direct current energy for AC energy using supply convertor.
Supply convertor makes engine in rotation speed change, guarantees output direct current by carrying out power generation pressure stabilizing control to starter-generator
Voltage stabilization.
Aerospace field to the volume of carrying equipment and it is important ask more stringent, in order to meet high power density, start
The usual working speed of machine is higher, and in power generation, the electric frequency of starter-generator is up to 1~2kHz.It is other with new-energy automobile etc.
Civilian starter-generator is compared, motor electric frequency high 1 several magnitudes, so that the realization difficulty of supply convertor increases.Together
When, the high-power aircraft of aerospace field is just from low-voltage direct (LVDC) and variable speed constant frequency (VSCF) to high voltage direct current
(HVDC) transformation of (VFAC) system is exchanged, with constant pressure frequency conversion to obtain higher system working efficiency.
For the multiplexing supply convertor of starter-generator, current main implementation strategy has following several:
1) for aircraft variable speed constant frequency (VSCF) system using three-level formula brushless synchronous machine, starting-generating multiplexing electricity
Source converter includes adapter, rectifier, inverter and alternating current filter.The function that starts and generate electricity is realized by the switching of adapter
The switching of energy, realizes the multiplexing of hardware.At the start, the rectified device of 400Hz constant frequency pressure stabilizing alternating current realizes AC/DC transformation, then
Transformer frequency conversion ac is generated through inverter to provide torque for three-level formula brushless synchronous machine；In generator, three-level formula is brushless
The constant pressure frequency conversion that synchronous motor generates exchanges rectified device and realizes AC/DC transformation, then forms 400Hz constant voltage constant frequency through inverter and hand over
Stream filters out the high-frequency harmonic composition of inverter generation finally by alternating current filter.
2) for aircraft high voltage direct current (HVDC) system using switching magnetic-resistance, starting-generating multiplexing supply convertor is adopted
With asymmetrical half-bridge topology.A, B and C three-phase is respectively adopted one group of asymmetrical half-bridge and is controlled.Starting process and power generation process
In, asymmetrical half-bridge works in different angle range.Starting torque control is realized by adjusting phase angle and exciting current size
With power generation pressure stabilizing control.
3) for using permanent-magnet synchronous motor civilian direct current system, starting-generating be multiplexed supply convertor use by
The three-phase fully-controlled full-bridge topology of the switch composition of three-phase six.When starting, three-phase fully-controlled full-bridge topology is used as inverter, is usually adopted
It is controlled with SVPWM and realizes motor torque control；When power generation, three-phase fully-controlled full-bridge topology is used as rectifier, is generallyd use
Power generation pressure stabilizing control is realized in SVPWM control.
Scheme 1) described in supply convertor be most widely used aboard, but its major defect be hardware configuration more
Complexity, and it is not suitable for high voltage direct current (HVDC) system, and high voltage direct current (HVDC) has with respect to variable speed constant frequency (VSCF) system
Higher system effectiveness represents the main flow direction of future development.Scheme 2) described in supply convertor hardware configuration is simple, efficiency
High, high reliablity, but its major defect is that armature winding electric current is extremely irregular, when impacting greatly, and generating electricity to supply convertor
The power quality pole of direct current.Scheme 3) described in supply convertor hardware it is simple, but deficiency is three realized by Si device
Mutually full control full-bridge topology working frequency is usually less than 20kHz, be usually applied to switching frequency higher than 1 magnitude of motor electric frequency with
On operating condition, it is difficult to directly apply to electric frequency up to 1~2kHz aircraft starting-generating system；Input voltage range is limited；
Power tube current is bigger than normal, and power tube operating condition is severe.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of power conversion of high-speed permanent magnetic starter-generator
Device.
The utility model is achieved by the following technical programs.
A kind of supply convertor of high-speed permanent magnetic starter-generator provided by the utility model, including current detection circuit,
SiC device controls the phased full-bridge of full-bridge, SCR device, switching circuit, voltage detecting circuit and control circuit entirely；The current detecting
Circuit is connect with the three-phase alternating current end of high-speed permanent magnetic starter-generator, the three-phase alternating current end of current detection circuit respectively with SiC device
Part is controlled full-bridge entirely and is connected with the three-phase alternating current end of the phased full-bridge of SCR device, and SiC device controls the DC terminal anode of full-bridge through switching entirely
Circuit is connect with DC bus anode, and the DC terminal cathode that SiC device controls full-bridge entirely is connect with DC bus cathode, SCR device
The DC terminal anode and cathode of phased full-bridge are connect with DC bus anode and cathode respectively, switching circuit cathode and DC bus
Cathode connection, high-speed permanent magnetic starter-generator connects to the control circuit through magnetoresistance transformer, DC bus anode and negative
Pole is connected to the control circuit through voltage detecting circuit, and current detection circuit connects to the control circuit, and control circuit is complete with SiC device
Control full-bridge, the phased full-bridge of SCR device are connected with switching circuit.
It includes SiC metal-oxide-semiconductor V that the SiC device controls full-bridge entirely1~V6With thin-film capacitor C1, the metal-oxide-semiconductor V1Source electrode and
Metal-oxide-semiconductor V2Drain electrode be connected with a of high-speed permanent magnetic starter-generator, the b phase of high-speed permanent magnetic starter-generator and metal-oxide-semiconductor V3's
Source electrode and metal-oxide-semiconductor V4Drain electrode connection, the c phase of high-speed permanent magnetic starter-generator and metal-oxide-semiconductor V5Source electrode and metal-oxide-semiconductor V6Drain electrode
Connection, metal-oxide-semiconductor V1, metal-oxide-semiconductor V3With metal-oxide-semiconductor V5Drain electrode control the DC terminal anode of full-bridge entirely with SiC device and connect, metal-oxide-semiconductor V2、
Metal-oxide-semiconductor V4With metal-oxide-semiconductor V6Source electrode control the DC terminal cathode of full-bridge entirely with SiC device and connect, metal-oxide-semiconductor V1~V6Grid and control
Circuit connection processed, thin-film capacitor C1The DC terminal anode of full-bridge is controlled at both ends entirely with SiC device respectively and cathode is connect, SiC device
The DC terminal cathode of full control full-bridge is connect with DC bus cathode.
The phased full-bridge of SCR device includes inductance La1、La2And La3, quick SCR pipe Q1~Q6, thin-film capacitor C2；It is described
Inductance La1One end be connected with a of fast permanent magnetism starter-generator, inductance La1The other end and SCR pipe Q1Anode and SCR pipe
Q4Cathode connection, the b phase of high-speed permanent magnetic starter-generator is through inductance Lb1With SCR pipe Q3Anode and Q6Cathode connection, high speed
The c phase of permanent magnetism starter-generator is through inductance Lc1With SCR pipe Q5Anode and SCR pipe Q2Cathode connection, SCR pipe Q1、Q3And Q5's
Cathode is connect with the anode of the DC terminal of the phased full-bridge of SCR device, SCR pipe Q2、Q4And Q6Anode and the phased full-bridge of SCR device
DC terminal cathode connection, SCR pipe Q1~Q6Grid connect to the control circuit, thin-film capacitor C2Both ends respectively with SCR device
The DC terminal anode of phased full-bridge is connected with cathode, and the DC terminal anode and cathode of the phased full-bridge of SCR device are respectively and directly
Stream bus anode is connected with cathode.
The switching circuit includes SiC metal-oxide-semiconductor V7, diode D1With inductance L1, the SiC metal-oxide-semiconductor V7Drain electrode with
SiC device controls the proper pole connection of full-bridge direct current, SiC metal-oxide-semiconductor V entirely7Source electrode and D1Cathode and inductance L1One end connection, electricity
Feel L1The other end connect with DC bus anode, diode D1Anode connect with DC bus cathode, SiC metal-oxide-semiconductor V7's
Grid connects to the control circuit.
The utility model has the beneficial effects that:
1) generator output electric frequency is improved to 1~2kHz, the weight of starter-generator system can be significantly reduced；
2) SiC device controls full-bridge entirely and the phased full-bridge of SCR device constitutes buck topology, constitutes relative to full control full-bridge
Boost topology, wider to the input voltage range applicability of starter-generator, the engine speed range being suitable for is also wider；
3) the buck topology that SiC device controls that full-bridge and the phased full-bridge of SCR device are constituted entirely uses parallel-connection structure, relative to
The cascaded structure being made of uncontrollable rectifier and DC/DC converter, system effectiveness is higher when power generation；
4) boost-buck power converter topology structure used by is higher than the armature winding voltage high pressure of starter-generator
Using winding voltage corresponding to full control full-bridge boost topology, winding current can effectively reduce, increase can be achieved for machine winding
Property；Itself synchronous inductance of starter-generator can be increased, it is no longer necessary to add the big inductance of auxiliary again in supply convertor, and subtract
Small three-phase fully-controlled full-bridge injects motor high frequency ripple current bring added losses；The power device in supply convertor is set to work
Near DC bus-bar voltage, the requirement of operating voltage and electric current to power device is more mild；
5) when starter-generator is overrun, the phased full-bridge of cutting SCR device and switching tube V can be passed through7Driving keep away
Exempt from bus overvoltage；
6) SiC device is controlled full-bridge entirely and is realized using SiC MOS device, relative to Si device, is operable with higher frequency；
7) SiC device controls full-bridge using current mode three-phase Boost rectification control realization boost type pressure stabilizing entirely, belongs to non-linear
Control strategy controls the boost type pressure stabilizing of this Linear Control relative to using SVPWM, be applicable to starting-generating armature around
The case where voltage is slightly below DC bus-bar voltage when group is not controlled rectification；
8) the phased full-bridge working frequency of SCR device is identical as generator electric frequency, and working frequency, which is substantially less than, uses PWM whole
The three-phase fully-controlled full-bridge of flow control, it is more efficient；Meanwhile the spectral components for exporting ripple voltage in DC voltage are lower, are easier to
In making power pack meet the requirement in GJB181 to distressed spectrum；
9) when the phased full-bridge of SCR device works, due to the presence of starter-generator inductance, it is overlapping that there are apparent commutation angles
Phenomenon, the current continuity after making rectification is higher, relative to the three-phase fully-controlled full-bridge using PWM rectification control, DC bus filter
The ripple current virtual value of wave capacitor significantly reduces, and effectively prevents DC bus filter capacitor heating problem；
10) avoid realizing supply convertor using liquid aluminum capacitor, supply convertor efficient memory up to 14 years with
On.
Detailed description of the invention
Fig. 1: the power converter configurations block diagram of high-speed permanent magnetic starter-generator；
Fig. 2: the supply convertor main power circuit figure of high-speed permanent magnetic starter-generator；
Fig. 3: SCR phased step-down rectifier principle；
Fig. 4: current mode three-phase Boost rectification main power circuit figure；
Fig. 5: current mode three-phase Boost rectification timing control figure；
Fig. 6: current mode three-phase Boost rectification control principle drawing；
Fig. 7: SCR phase control rectifier simulated current waveform diagram；
Fig. 8: current mode three-phase Boost rectification simulation waveform.
Specific embodiment
Be described further below the technical solution of the utility model, but claimed range be not limited to it is described.
A kind of supply convertor of high-speed permanent magnetic starter-generator as shown in Fig. 1~2, including current detection circuit, SiC device
Part controls the phased full-bridge of full-bridge, SCR device, switching circuit, voltage detecting circuit and control circuit entirely；The current detection circuit with
The three-phase alternating current end of high-speed permanent magnetic starter-generator connects, and the three-phase alternating current end of current detection circuit is controlled with SiC device entirely respectively
Full-bridge is connected with the three-phase alternating current end of the phased full-bridge of SCR device, SiC device control full the DC terminal anode of full-bridge through switching circuit with
The connection of DC bus anode, the DC terminal cathode that SiC device controls full-bridge entirely are connect with DC bus cathode, and SCR device is phased complete
The DC terminal anode and cathode of bridge are connect with DC bus anode and cathode respectively, and switching circuit cathode and DC bus cathode connect
It connects, high-speed permanent magnetic starter-generator is connected to the control circuit through magnetoresistance transformer, and DC bus anode and cathode are through electricity
Pressure detection circuit connects to the control circuit, and current detection circuit connects to the control circuit, and control circuit and SiC device are controlled entirely entirely
The phased full-bridge of bridge, SCR device is connected with switching circuit.
It includes SiC metal-oxide-semiconductor V that the SiC device controls full-bridge entirely1~V6With thin-film capacitor C1, the metal-oxide-semiconductor V1Source electrode and
Metal-oxide-semiconductor V2Drain electrode be connected with a of high-speed permanent magnetic starter-generator, the b phase of high-speed permanent magnetic starter-generator and metal-oxide-semiconductor V3's
Source electrode and metal-oxide-semiconductor V4Drain electrode connection, the c phase of high-speed permanent magnetic starter-generator and metal-oxide-semiconductor V5Source electrode and metal-oxide-semiconductor V6Drain electrode
Connection, metal-oxide-semiconductor V1, metal-oxide-semiconductor V3With metal-oxide-semiconductor V5Drain electrode control the DC terminal anode of full-bridge entirely with SiC device and connect, metal-oxide-semiconductor V2、
Metal-oxide-semiconductor V4With metal-oxide-semiconductor V6Source electrode control the DC terminal cathode of full-bridge entirely with SiC device and connect, metal-oxide-semiconductor V1~V6Grid and control
Circuit connection processed, thin-film capacitor C1The DC terminal anode of full-bridge is controlled at both ends entirely with SiC device respectively and cathode is connect, SiC device
The DC terminal cathode of full control full-bridge is connect with DC bus cathode.
The phased full-bridge of SCR device includes inductance La1、La2And La3, quick SCR pipe Q1~Q6, thin-film capacitor C2；It is described
Inductance La1One end be connected with a of fast permanent magnetism starter-generator, inductance La1The other end and SCR pipe Q1Anode and SCR pipe
Q4Cathode connection, the b phase of high-speed permanent magnetic starter-generator is through inductance Lb1With SCR pipe Q3Anode and Q6Cathode connection, high speed
The c phase of permanent magnetism starter-generator is through inductance Lc1With SCR pipe Q5Anode and SCR pipe Q2Cathode connection, SCR pipe Q1、Q3And Q5's
Cathode is connect with the anode of the DC terminal of the phased full-bridge of SCR device, SCR pipe Q2、Q4And Q6Anode and the phased full-bridge of SCR device
DC terminal cathode connection, SCR pipe Q1~Q6Grid connect to the control circuit, thin-film capacitor C2Both ends respectively with SCR device
The DC terminal anode of phased full-bridge is connected with cathode, and the DC terminal anode and cathode of the phased full-bridge of SCR device are respectively and directly
Stream bus anode is connected with cathode.
The switching circuit includes SiC metal-oxide-semiconductor V7, diode D1With inductance L1, the SiC metal-oxide-semiconductor V7Drain electrode with
SiC device controls the proper pole connection of full-bridge direct current, SiC metal-oxide-semiconductor V entirely7Source electrode and D1Cathode and inductance L1One end connection, electricity
Feel L1The other end connect with DC bus anode, diode D1Anode connect with DC bus cathode, SiC metal-oxide-semiconductor V7's
Grid connects to the control circuit.
A kind of supply convertor control method of high-speed permanent magnetic starter-generator, method are as follows:
(1) armature winding the number of turns of high-speed permanent magnetic starter-generator is determined；
(2) the phase signal v of high-speed permanent magnetic starter-generator is obtained by magnetoresistance transformers, examined by electric current
The three-phase current signal i of slowdown monitoring circuit acquisition high-speed permanent magnetic starter-generatorabc, DC bus is obtained by voltage detecting circuit
Voltage signal Vdc；
(3) permanent magnetism starter-generator starts, and controls full-bridge power supply entirely from DC bus to SiC device, control circuit is according to phase
Position signal vsWith three-phase current signal iabc, control the control of full-bridge entirely to SiC device using SVPWM strategy, control SiC device entirely
Torque needed for full-bridge drives high-speed permanent magnetic starter-generator to generate engine start；
(4) it is steady using supply convertor control DC bus when driven by engine high-speed permanent magnetic starter-generator is generated electricity
Pressure stablizes DC bus-bar voltage in desired voltage value；
It is powered from high-speed permanent magnetic starter-generator to supply convertor, control circuit is according to phase signal vs, three-phase current
Signal iabcWith voltage signal Vdc, control the phased full-bridge of full-bridge, SCR device entirely to SiC device and switching circuit carry out control and realizes electricity
Source converter stablizes DC bus-bar voltage in desired voltage value to DC bus powered.
The specific determining method of armature winding the number of turns of generator is in the step (1), in engine operation in highest
When revolving speed, high-speed permanent magnetic starter-generator work in generating state, by high-speed permanent magnetic starter-generator three-phase windings through three-phase two
Unloaded DC voltage is 1.5~2 times of DC bus-bar voltage to determine high-speed permanent magnetic starter-generator after pole pipe uncontrollable rectifier
Armature winding the number of turns.
DC bus pressure stabilizing control is to be supplied by high-speed permanent magnetic starter-generator to supply convertor in the step (4)
Electricity, control circuit is according to phase signal vs, three-phase current signal iabcWith voltage signal Vdc, control full-bridge, SCR device entirely to SiC device
The phased full-bridge of part and switching circuit carry out control and realize that supply convertor to DC bus powered, and stablizes DC bus-bar voltage
In desired voltage value.
The DC bus pressure stabilizing control method is specially following steps,
(4.1) when starter-generator works in the slow-speed of revolution, and DC bus-bar voltage is lower than desired voltage value, control circuit
Control SiC MOSV7Conducting disconnects the control signal of SCR device phase control full-bridge, is rectified and is controlled using current mode three-phase Boost
Strategy is controlled full-bridge entirely to SiC device and is controlled, and realizes boost function, DC bus-bar voltage is made to remain desired voltage value
Vref；
(4.2) when starter-generator works in high revolving speed, and DC bus-bar voltage is higher than desired voltage value, control circuit
Control SiC MOSV7It disconnects, disconnects the control signal that SiC device controls full-bridge entirely, SCR device is controlled entirely using phase control strategy
Full-bridge is controlled, and realizes buck functionality, DC bus-bar voltage is made to remain desired voltage value Vref；
(4.3) when starter-generator is worked in and overrun, disconnect SiC device control full full-bridge, SCR device control full full-bridge and
SiC MOSV7Driving realizes front end high-voltage isolating, avoids DC bus over-voltage.
The current mode three-phase Boost rectification control includes the following steps, using outer voltage, current inner loop control；
(4.1.1) outer voltage will be by that will it is expected d-c bus voltage value VrefWith voltage signal VdcDifference is asked to carry out PI tune again
Section generates the reference signal I of current inner loopref；
In the three-phase voltage of (4.1.2) starter-generator when a phase highest, current inner loop is in Fixed Time Interval by V2Driving
Height is set, a phase current i is waitedaGreater than reference signal IrefWhen, SiC MOSV2Height is set in driving, and SiC device controls its complementary work in full-bridge entirely
Rate Guan Jun sets low grid；
In the three-phase voltage of (4.1.3) starter-generator when b phase highest, current inner loop is in Fixed Time Interval by SiC
MOSV4Height is set in driving, waits b phase current ibGreater than IrefWhen, SiC MOSV4Height is set in driving, and SiC device controls its complementary work in full-bridge entirely
Rate Guan Jun sets low grid；
In the three-phase voltage of (4.1.4) starter-generator when c phase highest, current inner loop is in Fixed Time Interval by SiC
MOSV6Height is set in driving, waits c phase current icGreater than IrefWhen, SiC MOSV6Height is set in driving, and SiC device controls its complementary work in full-bridge entirely
Rate Guan Jun sets low grid
Embodiment: the present embodiment as shown in Fig. 1~8 is using 6 pole, 27 slot permanent magnetism starter-generator, at 5700r/min
Starting power need to reach 60kW；The 40kW electric energy that pressure stabilizing output 270V is needed within the scope of 12000~18000r/min, can bear
The supply convertor that 21000r/min is not damaged.
Fig. 1 show the supply convertor device of proposed high-speed permanent magnetic starter-generator, including current detection circuit,
SiC device controls the phased full-bridge of full-bridge, SCR device, switching circuit, voltage detecting circuit and control circuit entirely；It is by high-speed permanent magnetic
Control full-bridge and the phased full-bridge of SCR device entirely with SiC device respectively through current detection circuit in the three-phase alternating current end of starter-generator
The connection of three-phase alternating current end, the DC terminal anode that SiC device controls full-bridge entirely are connect through switching circuit with DC bus anode, SiC device
The DC terminal cathode that part controls full-bridge entirely is connect with DC bus cathode, the DC terminal anode and cathode point of the phased full-bridge of SCR device
It is not connect with DC bus anode and cathode, switching circuit cathode is connect with DC bus cathode, high-speed permanent magnetic starter-generator
Rotor connect with engine by mechanical axis, high-speed permanent magnetic starter-generator is through magnetoresistance transformer and control circuit company
It connecing, DC bus anode and cathode are connected to the control circuit through voltage detecting circuit, and current detection circuit connects to the control circuit,
Control circuit controls the phased full-bridge of full-bridge, SCR device with SiC device entirely and switching circuit connects and composes.
Fig. 2 show the supply convertor main power circuit figure of high-speed permanent magnetic starter-generator.The SiC device is controlled entirely entirely
Bridge includes SiC metal-oxide-semiconductor V1~V6With thin-film capacitor C1, it is a phase and V by high-speed permanent magnetic starter-generator1Source electrode and V2Leakage
Pole connection, the b phase and V of high-speed permanent magnetic starter-generator3Source electrode and V4Drain electrode connection, the c phase of high-speed permanent magnetic starter-generator
With V5Source electrode and V6Drain electrode connection, V1、V3And V5Drain electrode connect with DC terminal anode, V2、V4And V6Source electrode and DC terminal
Cathode connection, V1~V6Grid connect to the control circuit, thin-film capacitor C1Both ends are connect with DC terminal anode and cathode respectively,
DC terminal cathode is connected and composed with DC bus cathode.
SiC device controls each list bridge arm SiC metal-oxide-semiconductor selection 1200V/300A module CAS300M12BM2 in full-bridge entirely.
1200V SiC MOS loss is only the 1/8 of 1/4, the 1200V IGBT of 600V IGBT.600V IGBT is conventionally applied to
20kHz~40kHz is more universal, and it is more universal that 1200V IGBT is conventionally applied to 10kHz~20kHz.Consider switching loss with
Frequency is at than the loss parameter of SiC MOS is much smaller than IGBT, therefore it is operable with 40kHz or more.Relative to Si device, SiC device
Part controls full-bridge because realizing using SiC MOS device entirely, is operable with higher frequency.Thin-film capacitor C1Select 100 μ F/500V
DC-Link (C449) thin-film capacitor.
The phased full-bridge of SCR device includes inductance La1、La2And La3, quick SCR pipe Q1~Q6, thin-film capacitor C2, be by
The a phase of high-speed permanent magnetic starter-generator is through inductance La1With Q1Anode and Q4Cathode connection, the b of high-speed permanent magnetic starter-generator
Mutually through inductance Lb1With Q3Anode and Q6Cathode connection, the c phase of high-speed permanent magnetic starter-generator is through inductance Lc1With Q5Anode
And Q2Cathode connection, Q1、Q3And Q5Cathode connect with DC terminal anode, Q2、Q4And Q6Anode connect with DC terminal cathode,
Q1~Q6Grid connect to the control circuit, thin-film capacitor C2Both ends are connect with DC terminal anode and cathode respectively, DC terminal anode
It is connected and composed respectively with DC bus anode and cathode with cathode.
Each list bridge arm SCR pipe selects 1200V/200A high speed thyristor module MKC200- in the phased full-bridge of SCR device
12.The blocks current commutation time is 15~35 μ s, is operable with the phased full-bridge circuit of 400Hz~2.5kHz.SCR device phase
Control full-bridge working frequency is identical as generator electric frequency, and working frequency, which is substantially less than, uses the three-phase fully-controlled of PWM rectification control complete
Bridge, it is more efficient；Meanwhile the spectral components for exporting ripple voltage in DC voltage are lower, it is easier to meet power pack
To the requirement of distressed spectrum in GJB181.Inductance La1~Lc1For small inductor, core material uses the cobalt-based with high rectangular property
Non-crystalline material makes the inductance have certain pulsactor characteristic, and magnetic core opens air gap, and inductance value is about 1~2 μ H, and saturation current is
10A or so, winding are realized using flat type copper wire coiling.Inductance La1~Lc1Mistake when being mainly used for preventing SiC device from controlling full-bridge work entirely
Fast dv/dt causes SCR false triggering.Thin-film capacitor C2Select DC-Link (C449) thin-film capacitor of 1000 μ F/500V.
The switching circuit includes SiC metal-oxide-semiconductor V7, diode D1With inductance L1, it is by V7Drain electrode controlled entirely with SiC device
Full-bridge direct current rectifies pole connection, V7Source electrode and D1Cathode and inductance L1One end connection, inductance L1The other end and direct current it is female
The connection of line anode, diode D1Anode connect with DC bus cathode, V7Grid connect to the control circuit composition.
SiC metal-oxide-semiconductor V7, diode D1The upper metal-oxide-semiconductor in 1200V/300A module CAS300M12BM2 is respectively adopted under
The anti-parallel diodes of metal-oxide-semiconductor are realized.Inductance L1For small inductor, for core material using there is amorphous alloy material, magnetic core opens gas
Gap, inductance value are about 2~3 μ H.When SiC device controls full-bridge entirely and the phased full-bridge of SCR device switches between each other, capacitor C1And C2
On voltage and unequal, flow through power tube V in order to prevent7Electric current it is too big, be added to buffer inductance L1；Meanwhile being added to two
Pole pipe D1, it is inductance L1Provide corresponding freewheeling path.
The supply convertor proposed effectively prevents the use of liquid aluminum capacitor, and supply convertor efficient memory is reachable
14 years or more.
A kind of supply convertor control method of high-speed permanent magnetic starter-generator, comprising the following steps:
A, when engine operation works in generating state in maximum speed, high-speed permanent magnetic starter-generator, forever by high speed
Magnetic starter-generator non-loaded line voltage peak is 1.5~2 times of DC bus-bar voltage to determine high-speed permanent magnetic starter-generator
Armature winding the number of turns；
B, the phase signal v of high-speed permanent magnetic starter-generator is obtained by magnetoresistance transformers, pass through current detecting
The three-phase current signal i of circuit acquisition high-speed permanent magnetic starter-generatorabc, the electricity of DC bus is obtained by voltage detecting circuit
Press signal Vdc；
C, when engine start, DC bus anode is through inductance L1、V7Anti-parallel diodes and SiC device control entirely entirely
The connection of bridge DC terminal anode, DC bus cathode controls full-bridge direct current end cathode entirely with SiC device and connect, from DC bus to SiC
Device controls full-bridge power supply entirely, and control circuit is according to phase signal vsWith three-phase current signal iabc, using the realization pair of SVPWM strategy
SiC device controls the control of full-bridge entirely, so that SiC device is controlled full-bridge entirely and high-speed permanent magnetic starter-generator is driven to generate engine start institute
The torque needed；
D, when driven by engine high-speed permanent magnetic starter-generator is generated electricity, supply convertor carries out power generation pressure stabilizing control,
It is powered from high-speed permanent magnetic starter-generator to supply convertor, control circuit is according to phase signal vs, three-phase current signal iabcWith
Voltage signal Vdc, control the phased full-bridge of full-bridge, SCR device entirely to SiC device and switching circuit carry out control and realizes supply convertor
To DC bus powered, and stablize DC bus-bar voltage in desired voltage value.
Engine operation takes when maximum speed 18000r/min, high-speed permanent magnetic starter-generator work in generating state
High-speed permanent magnetic starter-generator three-phase windings unloaded DC voltage after three-phase diode uncontrollable rectifier is 450V, at this time corresponding hair
Electric phase inductance is 91 μ H.
SiC device controls full-bridge entirely and the phased full-bridge of SCR device constitutes buck topology, the liter constituted relative to full control full-bridge
Pressure topology, wider to the input voltage range applicability of starter-generator, the engine speed range being suitable for is also wider.SiC
Device controls buck topology that full-bridge and the phased full-bridge of SCR device are constituted using parallel-connection structure entirely, relative to by uncontrollable rectifier with
The cascaded structure that DC/DC converter is constituted, system effectiveness is higher when power generation.Used boost-buck power converter topology knot
Structure is higher than the armature winding voltage high pressure of starter-generator using winding voltage corresponding to full control full-bridge boost topology, can
Winding current is effectively reduced, increases the realizability of machine winding；Itself synchronous inductance that starter-generator can be increased, no longer needs
It to add the big inductance of auxiliary again in supply convertor, and reduce three-phase fully-controlled full-bridge injection motor high frequency ripple current bring
Added losses；Work in the power device in supply convertor near DC bus-bar voltage, operating voltage and electric current are to power
The requirement of device is more mild.When power generation, the power generation pressure stabilizing of supply convertor control the following steps are included:
A, when starter-generator works in the slow-speed of revolution, and DC bus-bar voltage is lower than desired voltage value, control circuit control
V processed7Conducting disconnects the control signal of SCR device phase control full-bridge, using current mode three-phase Boost rectification control strategy to SiC
Device is controlled full-bridge entirely and is controlled, and realizes boost function, DC bus-bar voltage is made to remain desired voltage value Vref；
B, when starter-generator works in high revolving speed, and DC bus-bar voltage is higher than desired voltage value, control circuit control
V processed7It disconnects, disconnects the control signal that SiC device controls full-bridge entirely, control full-bridge progress entirely to SCR device using phase control strategy
Control realizes buck functionality, DC bus-bar voltage is made to remain desired voltage value Vref；
C, when starter-generator is worked in and overrun, SiC device controls full-bridge entirely, SCR device controls full-bridge and V entirely for disconnection7It drives
It is dynamic, it realizes front end high-voltage isolating, avoids DC bus over-voltage.
SCR device controls the used phase control rectifier principle of full-bridge entirely as shown in figure 3, output average voltage UdWith Trigger Angle θ's
Shown in relationship such as formula (1).Trigger Angle θ is bigger, and output voltage is lower.
Ud=2.34U2cosθ (1)
In formula: U2- phase voltage.
When starter-generator is overrun, pass through the phased full-bridge of cutting SCR device and switching tube V7Driving avoid bus
Over-voltage can be effectively isolated failure, increase the reliability of supply convertor.
Current mode three-phase Boost rectification control the following steps are included:
A, using outer voltage, current inner loop control；
B, outer voltage will be by that will it is expected d-c bus voltage value VrefWith voltage signal VdcIt asks difference to carry out PI again and adjusts generation
The reference signal I of current inner loopref；
C, in the three-phase voltage of starter-generator when a phase highest, current inner loop is in Fixed Time Interval by V2Height is set in driving,
Wait a phase current iaGreater than IrefWhen, V2Height is set in driving, and SiC device controls remaining power tube in full-bridge entirely and sets low grid；
D, in the three-phase voltage of starter-generator when b phase highest, current inner loop is in Fixed Time Interval by V4Height is set in driving,
Wait b phase current ibGreater than IrefWhen, V4Height is set in driving, and SiC device controls remaining power tube in full-bridge entirely and sets low grid；
E, in the three-phase voltage of starter-generator when c phase highest, current inner loop is in Fixed Time Interval by V6Height is set in driving,
Wait c phase current icGreater than IrefWhen, V6Height is set in driving, and SiC device controls remaining power tube in full-bridge entirely and sets low grid.
Fig. 4 show current mode three-phase Boost rectification main power circuit figure, D in figurea、DbAnd DcRespectively SiC device is complete
Control V in full-bridge1、V3And V5Anti-parallel diodes.The circuit equivalent is connected in parallel in three Boost circuits, passes through timesharing
It controls three down tubes and realizes boost type pressure stabilizing, which is utilized generator synchronous inductance as boost inductance, only passes through control
Make three down tube V2、V4And V6To realize stability contorting.Fig. 5 show current mode three-phase Boost rectification timing control figure, only exists
When the voltage highest of corresponding phase, just down tube is controlled, specifically, the phase voltage in Fig. 5 refers to that generator itself synchronizes
Voltage before inductance.Fig. 6 show current mode three-phase Boost rectification control principle drawing, outer voltage is used, in peak point current
Ring, outer voltage are used to generate the reference signal I of current inner loopref, current inner loop is for making ix(x=a, b, c) is reference current
IrefCorresponding numerical value, current inner loop use peak value comparison method, its response speed can in this way be significantly higher than and is adjusted by PI
The linear loop that device is constituted, can preferably make ixTrack reference electric current Iref.Current inner loop each clock Clk rising edge by RS
Height is set in trigger output, makes electric current ixRise, until ixReach IrefWhen by rest-set flip-flop output set low, realize the single-revolution of pulse width
Phase is adjusted.Phase controlling send corresponding driving signal to power tube according to motor position, timesharing.Show to introduce through simulation study
Current inner loop carry out control be necessary, using only Voltage loop voltage-type Boost when be easy to appear three-phase transient current
It is excessive.
SiC device controls full-bridge using current mode three-phase Boost rectification control realization boost type pressure stabilizing entirely, belongs to non-linear control
System strategy is applicable to starter-generator armature winding relative to the boost type pressure stabilizing for controlling this Linear Control using SVPWM
The case where voltage is slightly below DC bus-bar voltage when not controlled rectification.
The supply convertor of high-speed permanent magnetic starter-generator is constructed by principle described in this patent using Matab/Simulink,
And it is emulated using proposed control method.Under 18000r/min, 40kW output condition, SCR phase control rectifier emulation electricity
It is as shown in Figure 7 to flow waveform diagram.When the phased full-bridge of SCR device works, due to the presence of starter-generator inductance, exists and significantly change
Phenomenon is overlapped to angle, the electric current i after making rectificationzContinuity is high, and the three-phase fully-controlled full-bridge of control is rectified relative to use PWM,
Only 5.7A, the significant decrease of the ripple current virtual value of DC bus filter capacitor, effectively prevents DC bus filter capacitor hair
Heat problem.It can pressure stabilizing output 270V direct current when phase shifting angle is 37 °.Exporting DC ripple voltage peak-to-peak value is only 1V, significant low
7V when simple PWM rectifier boost.
Fig. 8 is shown under 12000r/min, 40kW output condition, current mode three-phase Boost rectification simulation waveform, in figure
Phase voltage va~vcVoltage before referring to generator itself synchronous inductance.From light to heavy with load, pulse first appears at 0~30 °
Place；Then again present in 90~120 °；It finally gradually receives inside, is covered with full angle.
The supply convertor and control method of proposed high-speed permanent magnetic starter-generator are suitable for high voltage direct current (HVDC) system
System, generator output electric frequency may be up to 1~2kHz, can significantly reduce the weight of starter-generator system.
Claims (4)
1. a kind of supply convertor of high-speed permanent magnetic starter-generator, it is characterised in that: including current detection circuit, SiC device
Full control full-bridge, the phased full-bridge of SCR device, switching circuit, voltage detecting circuit and control circuit；The current detection circuit and height
The three-phase alternating current end of fast permanent magnetism starter-generator connects, and the three-phase alternating current end of current detection circuit is controlled with SiC device entirely entirely respectively
Bridge is connected with the three-phase alternating current end of the phased full-bridge of SCR device, and SiC device controls the DC terminal anode of full-bridge through switching circuit and straight entirely
The connection of bus anode is flowed, the DC terminal cathode that SiC device controls full-bridge entirely is connect with DC bus cathode, the phased full-bridge of SCR device
DC terminal anode and cathode connect respectively with DC bus anode and cathode, switching circuit cathode and DC bus cathode connect
It connects, high-speed permanent magnetic starter-generator is connected to the control circuit through magnetoresistance transformer, and DC bus anode and cathode are through electricity
Pressure detection circuit connects to the control circuit, and current detection circuit connects to the control circuit, and control circuit and SiC device are controlled entirely entirely
The phased full-bridge of bridge, SCR device is connected with switching circuit.
2. the supply convertor of high-speed permanent magnetic starter-generator as described in claim 1, it is characterised in that: the SiC device
Full control full-bridge includes SiC metal-oxide-semiconductor V1~V6With thin-film capacitor C1, the metal-oxide-semiconductor V1Source electrode and metal-oxide-semiconductor V2Drain electrode and high speed
The a of permanent magnetism starter-generator is connected, the b phase and metal-oxide-semiconductor V of high-speed permanent magnetic starter-generator3Source electrode and metal-oxide-semiconductor V4Drain electrode
Connection, the c phase and metal-oxide-semiconductor V of high-speed permanent magnetic starter-generator5Source electrode and metal-oxide-semiconductor V6Drain electrode connection, metal-oxide-semiconductor V1, metal-oxide-semiconductor V3
With metal-oxide-semiconductor V5Drain electrode control the DC terminal anode of full-bridge entirely with SiC device and connect, metal-oxide-semiconductor V2, metal-oxide-semiconductor V4With metal-oxide-semiconductor V6Source
The DC terminal cathode that pole controls full-bridge with SiC device entirely is connect, metal-oxide-semiconductor V1~V6Grid connect to the control circuit, thin-film capacitor C1
The DC terminal anode of full-bridge is controlled at both ends entirely with SiC device respectively and cathode is connect, SiC device control full the DC terminal cathode of full-bridge with
The connection of DC bus cathode.
3. the supply convertor of high-speed permanent magnetic starter-generator as described in claim 1, it is characterised in that: the SCR device
Phased full-bridge includes inductance La1、La2And La3, quick SCR pipe Q1~Q6, thin-film capacitor C2；The inductance La1One end and fast permanent magnetism
The a of starter-generator is connected, inductance La1The other end and SCR pipe Q1Anode and SCR pipe Q4Cathode connection, high-speed permanent magnetic
The b phase of starter-generator is through inductance Lb1With SCR pipe Q3Anode and Q6Cathode connection, the c phase of high-speed permanent magnetic starter-generator
Through inductance Lc1With SCR pipe Q5Anode and SCR pipe Q2Cathode connection, SCR pipe Q1、Q3And Q5Cathode and SCR device it is phased complete
The anode connection of the DC terminal of bridge, SCR pipe Q2、Q4And Q6Anode connect with the cathode of the DC terminal of the phased full-bridge of SCR device,
SCR pipe Q1~Q6Grid connect to the control circuit, thin-film capacitor C2Rectify respectively with the direct current of the phased full-bridge of SCR device at both ends
Pole is connected with cathode, and the DC terminal anode and cathode of the phased full-bridge of SCR device connect with DC bus anode and cathode respectively
It connects.
4. the supply convertor of high-speed permanent magnetic starter-generator as described in claim 1, it is characterised in that: the switching circuit
Including SiC metal-oxide-semiconductor V7, diode D1With inductance L1, the SiC metal-oxide-semiconductor V7Drain electrode and SiC device control full-bridge direct current end entirely
Anode connection, SiC metal-oxide-semiconductor V7Source electrode and D1Cathode and inductance L1One end connection, inductance L1The other end and direct current it is female
The connection of line anode, diode D1Anode connect with DC bus cathode, SiC metal-oxide-semiconductor V7Grid connect to the control circuit.
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| CN112234886A (en) * | 2020-08-27 | 2021-01-15 | 贵州恒芯微电子科技有限公司 | Reverse excitation method of starting all-in-one machine |
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| CN112234886A (en) * | 2020-08-27 | 2021-01-15 | 贵州恒芯微电子科技有限公司 | Reverse excitation method of starting all-in-one machine |
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