CN107579652A - Drive control device and drive control device discharge control method - Google Patents
Drive control device and drive control device discharge control method Download PDFInfo
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- CN107579652A CN107579652A CN201710809568.1A CN201710809568A CN107579652A CN 107579652 A CN107579652 A CN 107579652A CN 201710809568 A CN201710809568 A CN 201710809568A CN 107579652 A CN107579652 A CN 107579652A
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Abstract
The invention provides a kind of drive control device and drive control device discharge control method, wherein, the drive control device includes：Drive circuit, switching power circuit, wherein, the direct-flow input end of the switching power circuit is connected with the bus of the drive circuit, the direct-flow input end is used to obtain operating current from the drive circuit after drive control device power-off, until the voltage on the bus is less than or equal to the minimum operating voltage of the switching power circuit.Using above-mentioned technical proposal, discharge time is longer after solving the problems, such as the drive circuit power-off in correlation technique in drive control device, reduces the discharge time after the drive circuit power-off in drive control device.
Description
Technical field
The present invention relates to electronic circuit field, in particular to a kind of drive control device and drive control device electric discharge control
Method processed.
Background technology
For drive control device, due to powered equipment (such as：Compressor) control requirement, common busbar voltage
For 380V (single phase power supply is through PFC boost) and 540V (the directly uncontrollable rectification of three-phase), it is far longer than the safe voltage of the mankind, and
And typically on bus and the larger multiple electrochemical capacitors of capacitance can be connected to, it is female after being shut down every time in unit
The voltage of the still remaining several hectovolts of line.And currently used bus discharge method be using driving plate itself spurious impedance and
The ESR (equivalent series resistance) of electrochemical capacitor carrys out nature electric discharge, must need longer time could be voltage consumption to safety electricity
Pressure is following, for this employee or air-conditioner controller maintainer to driving plate workshop, first, it is hidden personal safety to be present
Suffer from, second, needing to spend the time etc. to be discharged or increasing an electric discharge process, influence operating efficiency.
The problem of discharge time is longer after being powered off for the drive circuit in drive control device in correlation technique, does not have also at present
Efficiently solve scheme.
The content of the invention
The embodiments of the invention provide a kind of drive control device and drive control device discharge control method, at least to solve phase
The problem of discharge time is longer after drive circuit power-off in the technology of pass in drive control device.
According to one embodiment of present invention, there is provided a kind of drive control device, including：Drive circuit, switch power supply
Road, wherein, the direct-flow input end of switching power circuit and the bus of drive circuit connect, and direct-flow input end is used in drive control
Operating current is obtained from drive circuit after device power-off, until the voltage on bus is less than or equal to the minimum of switching power circuit
Operating voltage.
Alternatively, the P lines in the positive pole and bus of direct-flow input end connect, the N in the negative pole and bus of direct-flow input end
Line connects.
Alternatively, switching power circuit includes：Ac input end and rectifier circuit, wherein, ac input end and rectification
The input connection of bridge circuit, the output end of rectifier circuit are connected with direct-flow input end.
Alternatively, the minimum operating voltage of switching power circuit is arranged to 36VDC.
Alternatively, switching power circuit is inverse-excitation type switch power-supply.
Alternatively, drive control device also includes：Control circuit, wherein, control circuit and drive circuit and switch power supply
Road connects, and control circuit is used to be operated in discontinuous conduct mode with pwm pattern controlling switch power circuit.
Alternatively, the property parameters of the high frequency transformer in switching power circuit be according at least to switching power circuit most
Low-work voltage configuration.
Alternatively, property parameters include：The primary electrical inductance value of the maximum ON time and high frequency transformer of high frequency transformer.
Alternatively, the maximum ON time of high frequency transformer be according to minimum operating voltage, high frequency transformer it is secondary defeated
The umber of turn ratio for going out voltage, the resetting time of high frequency transformer, the switch periods of high frequency transformer and high frequency transformer is matched somebody with somebody
Put, wherein, the umber of turn of high frequency transformer is than for the armature winding number of turn of high frequency transformer and the secondary of high frequency transformer
The ratio of umber of turn.
Alternatively, the primary electrical inductance value of high frequency transformer is according to minimum operating voltage, maximum ON time, high frequency transformation
What the switch periods of device and the peak power output of high frequency transformer configured.
According to another embodiment of the invention, there is provided a kind of drive control device discharge control method, including：Work as driving
Controller is after working condition power-off, by the direct-flow input end of the switching power circuit of drive control device from drive control device
Drive circuit obtains operating current, wherein, the bus connection of direct-flow input end and drive circuit；Control drive circuit electric discharge；When
When voltage on the bus of drive circuit is less than or equal to the minimum operating voltage of switching power circuit, controlling switch power supply electricity
Road is stopped.
Alternatively, it is electric in the driving of direct-flow input end from the drive control device of the switching power circuit by drive control device
Before road obtains operating current, method also includes：
Discontinuous conduct mode is operated in pwm pattern controlling switch power circuit, wherein, switching power circuit is anti-
Excitation type switch power-supply.
By the present invention, drive control device includes：Drive circuit, switching power circuit, wherein, switching power circuit it is straight
The bus for flowing input and drive circuit connects, and direct-flow input end is used to obtain work from drive circuit after drive control device power-off
Make electric current, until the voltage on bus is less than or equal to the minimum operating voltage of switching power circuit, it can be seen that, in use
The bus of the direct-flow input end and drive circuit of stating scheme switching power circuit connects so that is switched after drive control device power-off
Power circuit obtains operating current from drive circuit, continues for work, driving plate is still in working condition, such bus
Energy is quickly consumed always, and voltage just drops to the minimum operating voltage of switching power circuit from the high pressure of several hectovolts quickly
Hereinafter, therefore, reduce the discharge time after the drive circuit power-off in drive control device, driven so as to solve in correlation technique
The problem of discharge time is longer after drive circuit power-off in movement controller.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of structured flowchart one of drive control device according to embodiments of the present invention；
Fig. 2 is a kind of structured flowchart two of drive control device according to embodiments of the present invention；
Fig. 3 is a kind of structured flowchart three of drive control device according to embodiments of the present invention；
Fig. 4 is a kind of structured flowchart four of drive control device according to embodiments of the present invention；
Fig. 5 is the drive control device schematic diagram according to alternative embodiment of the present invention；
Fig. 6 is a kind of flow chart of drive control device discharge control method according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.
Embodiment 1
A kind of drive control device is additionally provided in the present embodiment, and Fig. 1 is a kind of driving control according to embodiments of the present invention
The structured flowchart one of device processed, as shown in figure 1, the drive control device 10 includes：
Drive circuit 12, switching power circuit 14, wherein,
The direct-flow input end 142 of switching power circuit is connected with the bus 122 of drive circuit, and direct-flow input end 142 is used for
Operating current is obtained from drive circuit 12 after drive control device power-off, until the voltage on bus is less than or equal to switch electricity
The minimum operating voltage of source circuit.
Alternatively, in the present embodiment, above-mentioned drive control device can be, but not limited to be applied to compressor of air conditioner, refrigerator pressure
The equipment such as contracting machine.
Alternatively, in the present embodiment, above-mentioned drive control device can be, but not limited to include：Driven compressor plate.Such as：
DRIVEN BY AIR CONDITIONING COMPRESSOR plate, freezer compressor driving plate etc..
Alternatively, in the present embodiment, above-mentioned drive circuit can be, but not limited to the equipment work for driving it to connect,
The equipment can be, but not limited to as compressor etc..
Alternatively, in the present embodiment, it is drive circuitry that above-mentioned switching power circuit, which can be, but not limited to be used for,.
It can be seen that connected using the direct-flow input end of such scheme switching power circuit and the bus of drive circuit so that
Switching power circuit obtains operating current from drive circuit after drive control device power-off, continues for work, driving plate is still located
In working condition, the energy of such bus is quickly consumed always, and voltage just drops to switch from the high pressure of several hectovolts quickly
Below the minimum operating voltage of power circuit, therefore, reduce the discharge time after the drive circuit power-off in drive control device,
So as to solve the problems, such as that discharge time is longer after the drive circuit power-off in correlation technique in drive control device.
Fig. 2 is a kind of structured flowchart two of drive control device according to embodiments of the present invention, as shown in Fig. 2 alternatively, directly
The P lines 22 flowed in the positive pole and bus of input 142 connect, and the N lines 24 in the negative pole and bus of direct-flow input end connect.
Fig. 3 is a kind of structured flowchart three of drive control device according to embodiments of the present invention, as shown in figure 3, alternatively, opening
Powered-down source circuit 14 includes：Ac input end 32 and rectifier circuit 34, wherein,
Ac input end 32 is connected with the input 342 of rectifier circuit 34, the output end 344 and direct current of rectifier circuit
Input 142 connects.
Alternatively, in the present embodiment, ac input end can be connected with AC power, for receiving exchange input.
Alternatively, in the present embodiment, drive control device it is onboard switching power circuit exchange input rectifying after just,
Negative pole is respectively connecting to the P lines and N lines of drive circuit, switching power circuit and drive circuit is in common bus state.Driving
The onboard switching power circuit of controller can be, but not limited to sample reverse exciting topological, and the input voltage range of its work passes through meter
The turn ratio, inductance, leakage inductance parameter and the operating current pattern for calculating change high frequency transformer realize adjustment.Such as：In the present embodiment
In, the minimum operating voltage realized to input voltage range can be 36VDC, and the input voltage upper limit can require according to relevant criterion
It is adjusted.When electric on unit, the switching power circuit first power taking at alternating current input power supplying, by can not control rectifying circuit it is whole
It flow to and is more than 36VDC, then Switching Power Supply works together, and its secondary output is established voltage, then to the control in driving plate
System and load supplying at different levels, then controlled rectification circuit work together, busbar voltage is by PFC boost to 380V, afterwards
The rectifier bridge of switch power supply secondary does not work (the not power taking at exchange), switchs to only from drive circuit bus work to take power.
After driving plate powers off, because Switching Power Supply can still be held from the bus power taking of drive circuit, switching power circuit
Continue work, now the control system in driving plate, power model are still in working condition, and the energy of such bus is fast always
Speed consumes, and voltage just drops to below 36V from the high pressure of several hectovolts quickly, after Switching Power Supply does not work, at remaining 36V
In direct current safe voltage scope, then discharged in the form of consuming naturally.
Alternatively, the span of the minimum operating voltage of above-mentioned switching power circuit can be, but not limited to as 0-48VDC.
Such as：The minimum operating voltage of switching power circuit could be arranged to 36VDC.
Alternatively, above-mentioned switching power circuit can be, but not limited to as inverse-excitation type switch power-supply.
Fig. 4 is a kind of structured flowchart four of drive control device according to embodiments of the present invention, as shown in figure 4, alternatively, driving
Movement controller also includes：Control circuit 42, wherein,
Control circuit 42 is connected with drive circuit 12 and switching power circuit 14, and control circuit 42 is used to control mould with PWM
Formula controlling switch power circuit is operated in discontinuous conduct mode.
Alternatively, the property parameters of the high frequency transformer in switching power circuit be according at least to switching power circuit most
Low-work voltage configuration.
Alternatively, above-mentioned property parameters can be, but not limited to include：The maximum ON time and high frequency of high frequency transformer become
The primary electrical inductance value of depressor.
Alternatively, the maximum ON time of high frequency transformer be according to minimum operating voltage, high frequency transformer it is secondary defeated
The umber of turn ratio for going out voltage, the resetting time of high frequency transformer, the switch periods of high frequency transformer and high frequency transformer is matched somebody with somebody
Put, wherein, the umber of turn of high frequency transformer is than for the armature winding number of turn of high frequency transformer and the secondary of high frequency transformer
The ratio of umber of turn.
In an optional embodiment, the above-mentioned first turn ratio of high frequency transformer can accordingly be adjusted or do not adjusted.
Vds (max)=Vin (max)+(Np/Ns) * (Vo+1) (1)
Wherein, Vds (max) is the maximum leakages of MOSFET, (elder generation does not consider the folded of leakage inductance spike to source voltage stress here
Add)；Vin (max) is primary maximum output DC voltage；Vo is secondary output voltage；Np is the armature winding number of turn；Ns is secondary
Umber of turn.
The first turn ratio of high frequency transformer is depending on power MOSFET maximum resistance to compression in main topology, due to opening
The maximum operating voltage of powered-down source circuit does not change, and simply can be not required to adjust to low-voltage direction expanded scope, the turn ratio of transformer
It is dynamic.
In this optional embodiment, MOSFET maximum ON time is needed than original increase.
In order to ensure magnetic core unsaturation, the voltagesecond product during the conducting of transformer is equal with resetting voltagesecond product：
(Vin (min) -1) * Tmax=(Vo+1) * Tr* (Np/Ns) (2)
And in order to ensure that circuit works in DCM (discontinuous conduct mode) all the time, it is necessary to assure maximum in minimum input voltage
Maximum service time during power output meets following formula：
Tmax+Tr=0.8T (3)
Vin (min) is primary minimum input direct voltage；Tmax is MOSFET maximum service time；Vo is secondary
Output voltage；Tr is the resetting time of transformer；T is switch periods；
Convolution (2) and formula (3), can obtain maximum ON time：
Tmax=(Vo+1) * (Np/Ns) * (0.8T)/((Vmin-1)+(Vo+1) * (Np/Ns)) (4)
Because Vin (min), Vo are determined by specified criteria, (Np/Ns) is determined by formula (1), because Vin (min) will reduce,
Then maximum ON time Tmax will accordingly increase.
Alternatively, the primary electrical inductance value of high frequency transformer is according to minimum operating voltage, maximum ON time, high frequency transformation
What the switch periods of device and the peak power output of high frequency transformer configured.
In above-mentioned optional embodiment, primary inductance value reduces than original.
Assuming that the efficiency of power supply is 80%, then have
Pin (max)=1.25*Po (max)=0.5* (Lp*Ip2)/T (5)
Because maximum ON time appear in input voltage it is minimum when, then have
Ip=Vin (min) * Tmax/Lp (6)
Substitution formula (4)
Lp=(Vin (min) * Tmax)2/(2.5*T*Po(max)) (7)
Pin (max) is the maximal input corresponding with peak power output；Po (max) is peak power output；Lp
For primary electrical inductance value；The current peak of primary inductance when Ip opens for MOSFET；
Because Po (max), T can be determined that Vin (min) will be reduced to 36VDC by given design condition, Vin (min) reduces
Amplitude be much larger than Tmax increase amplitude, so knowing that Lp will accordingly increase by formula (7).
In this optional real-time mode, it need to only reduce primary electrical inductance value, the maximum service time isallobaric device parameter of increase,
The expansion to low input working range can be realized, so as to realize safe and efficient driving plate busbar voltage electric discharge.
Alternatively, above-mentioned drive circuit can be, but not limited to include：Rectification circuit, capacitance group circuit and inverter circuit, its
In, rectification circuit, capacitance group circuit and inverter circuit are in parallel.
Alternatively, above-mentioned rectification circuit can be, but not limited to as controlled rectification circuit.
Alternatively, the output end of above-mentioned switching power circuit can be, but not limited to be connected with rectification circuit.
Alternatively, the output end of above-mentioned switching power circuit can be, but not limited to be connected with inverter circuit.
Alternatively, the present embodiment additionally provides a kind of air-conditioning equipment, wherein, the air-conditioning equipment includes upper in the present embodiment
State any one drive control device.
It is described in detail with reference to alternative embodiment of the present invention.
Alternative embodiment of the present invention provides a kind of drive control device.Fig. 5 is the driving according to alternative embodiment of the present invention
Controller schematic diagram, as shown in figure 5, using drive control device as driven compressor plate, the minimum operating voltage of switching power circuit
It is arranged to exemplified by 36VDC, the driven compressor plate includes drive circuit, switching power circuit, DSP control system, wherein, driving
Circuit includes controlled rectifier, capacitance group and inversion module, and inversion module is connected with motor PMSM, controlled rectifier, switch
Power circuit and DSP control system are connected with AC power.The both positive and negative polarity of the direct-flow input end of switching power circuit respectively with drive
P, N line connection of dynamic circuit busbar, make Switching Power Supply and drive circuit be in common bus state.Generally drive onboard switch electricity
Source sampling reverse exciting topological, the input voltage range of its work are joined by calculating the turn ratio for changing high frequency transformer, inductance, leakage inductance
Number and operating current pattern realize adjustment, and the minimum operating voltage for requiring to realize to input voltage range is 36VDC, input electricity
The pressure upper limit can be adjusted according to relevant criterion requirement.When electric on unit, the Switching Power Supply first power taking at alternating current input power supplying,
By uncontrollable rectification to 36VDC is more than, then Switching Power Supply works together, and its secondary output is established voltage, then to drive
The control system on plate and load supplying at different levels are moved, then controllable rectifier module works together, and busbar voltage passes through PFC boost
To 380V, the rectifier bridge of switch power supply secondary does not work (the not power taking at exchange) afterwards, switchs to only from major loop bus power taking
Work.
After driving plate powers off, because Switching Power Supply still understands continuous firing from major loop bus power taking, Switching Power Supply, this
When driving plate on control system, power model be still in working condition, the energy of such bus is quickly consumed always,
Voltage just drops to below 36V from the high pressure of several hectovolts quickly, and after Switching Power Supply does not work, remaining 36V is in direct current peace
Full voltage range, then discharged in the form of consuming naturally.
The charging method of this alternative embodiment need to only change PCB layout circuit and modification high frequency on the basis of driving plate
The key parameter of transformer, change the operating voltage range of Switching Power Supply, the repid discharge of busbar voltage can be realized, to driving
The production efficiency of plate, personal safety all bring very big facility.
By reducing primary electrical inductance value, the maximum service time isallobaric device parameter of increase, can realize to low input
The expansion of working range, so as to realize safe and efficient busbar voltage electric discharge.
This drive control device, from bus way to take power, and increases the operating voltage range of Switching Power Supply by Switching Power Supply
(being extended to low pressure), consumes bus energy using the operation of whole control system in driving plate, can solve when driving plate is fallen
When electric, the excessively slow caused security hidden trouble of bus discharge and driving plate production efficiency problem.
In summary, the drive control device that this alternative embodiment provides in the case where not increasing hardware cost, open by increase
The direct current way to take power in powered-down source, and the parameter such as turn ratio, leakage inductance, inductance by redesigning switch power high-frequency transformer,
Increase the input voltage range (minimum operating voltage is decreased to 36VDC) of Switching Power Supply work, after powering off driving plate, bus electricity
Pressure is dropped rapidly to below 36V, eliminates the bus discharge circuit additionally set, and solves driving plate bus nature discharge band and come
Potential safety hazard and low production efficiency problem.
Embodiment 2
A kind of drive control device discharge control method is provided in the present embodiment, and Fig. 6 is according to embodiments of the present invention
A kind of flow chart of drive control device discharge control method, as shown in fig. 6, the flow comprises the following steps：
Step S602, after drive control device powers off from working condition, pass through the switching power circuit of drive control device
Direct-flow input end obtains operating current from the drive circuit of drive control device, wherein, the bus of direct-flow input end and drive circuit
Connection；
Step S604, control drive circuit electric discharge；
Step S606, when the voltage on the bus of drive circuit is less than or equal to the minimum work electricity of switching power circuit
During pressure, controlling switch power circuit is stopped.
Alternatively, in the present embodiment, above-mentioned drive control device control method can be, but not limited to applied to air conditioner compressed
The equipment such as machine, freezer compressor.
Alternatively, in the present embodiment, above-mentioned drive control device can be, but not limited to include：Driven compressor plate.Such as：
DRIVEN BY AIR CONDITIONING COMPRESSOR plate, freezer compressor driving plate etc..
Alternatively, in the present embodiment, above-mentioned drive circuit can be, but not limited to the equipment work for driving it to connect,
The equipment can be, but not limited to as compressor etc..
Alternatively, in the present embodiment, above-mentioned switching power circuit can be, but not limited to be used to supply for the drive circuit
Electricity.
Alternatively, the span of the minimum operating voltage of above-mentioned switching power circuit can be, but not limited to as 0-48VDC.
Such as：The minimum operating voltage of switching power circuit could be arranged to 36VDC.
By above-mentioned steps, after drive control device powers off from working condition, pass through the switch power supply of drive control device
The direct-flow input end on road obtains operating current from the drive circuit of drive control device, wherein, direct-flow input end and drive circuit
Bus connects；Control drive circuit electric discharge；When the voltage on the bus of drive circuit is less than or equal to switching power circuit
During minimum operating voltage, controlling switch power circuit is stopped, it can be seen that, using the straight of such scheme switching power circuit
The bus for flowing input and drive circuit connects so that switching power circuit obtains from drive circuit after drive control device power-off
Operating current, work being continued for, driving plate is still in working condition, and the energy of such bus is quickly consumed always,
Voltage just drops to below the minimum operating voltage of switching power circuit from the high pressure of several hectovolts quickly, therefore, reduces driving
The discharge time after drive circuit power-off in controller, so as to solve the drive circuit in correlation technique in drive control device
The problem of discharge time is longer after power-off.
Alternatively, before above-mentioned steps S602, can be, but not limited to pwm pattern controlling switch power circuit work
Make in discontinuous conduct mode, wherein, switching power circuit is inverse-excitation type switch power-supply.
Alternatively, before above-mentioned steps S602, can be, but not limited to configure switch electricity according at least to minimum operating voltage
The property parameters of high frequency transformer in source circuit.
Alternatively, above-mentioned property parameters can be, but not limited to include：The maximum ON time and high frequency of high frequency transformer become
The primary electrical inductance value of depressor, property parameters can be, but not limited to configure by following manner：
For maximum ON time, the secondary output electricity according to minimum operating voltage, high frequency transformer can be, but not limited to
Pressure, the resetting time of high frequency transformer, the umber of turn of the switch periods of high frequency transformer and high frequency transformer are than configuration most
Big ON time, wherein, the umber of turn of high frequency transformer is than the armature winding number of turn and high frequency transformer for high frequency transformer
Secondary winding turns ratio；
For primary electrical inductance value, can be, but not limited to according to minimum operating voltage, maximum ON time, high frequency transformer
Switch periods and the peak power output of high frequency transformer configuration primary electrical inductance value.
In an optional embodiment, the above-mentioned first turn ratio of high frequency transformer can accordingly be adjusted or do not adjusted.
Vds (max)=Vin (max)+(Np/Ns) * (Vo+1) (1)
Wherein, Vds (max) is the maximum leakages of MOSFET, (elder generation does not consider the folded of leakage inductance spike to source voltage stress here
Add)；Vin (max) is primary maximum output DC voltage；Vo is secondary output voltage；Np is the armature winding number of turn；Ns is secondary
Umber of turn.
The first turn ratio of high frequency transformer is depending on power MOSFET maximum resistance to compression in main topology, due to opening
The maximum operating voltage of powered-down source circuit does not change, and simply can be not required to adjust to low-voltage direction expanded scope, the turn ratio of transformer
It is dynamic.
In this optional embodiment, MOSFET maximum ON time is needed than original increase.
In order to ensure magnetic core unsaturation, the voltagesecond product during the conducting of transformer is equal with resetting voltagesecond product：
(Vin (min) -1) * Tmax=(Vo+1) * Tr* (Np/Ns) (2)
And in order to ensure that circuit works in DCM (discontinuous conduct mode) all the time, it is necessary to assure maximum in minimum input voltage
Maximum service time during power output meets following formula：
Tmax+Tr=0.8T (3)
Vin (min) is primary minimum input direct voltage；Tmax is MOSFET maximum service time；Vo is secondary
Output voltage；Tr is the resetting time of transformer；T is switch periods；
Convolution (2) and formula (3), can obtain maximum ON time：
Tmax=(Vo+1) * (Np/Ns) * (0.8T)/((Vmin-1)+(Vo+1) * (Np/Ns)) (4)
Because Vin (min), Vo are determined by specified criteria, (Np/Ns) is determined by formula (1), because Vin (min) will reduce,
Then maximum ON time Tmax will accordingly increase.
In above-mentioned optional embodiment, primary inductance value reduces than original.
Assuming that the efficiency of power supply is 80%, then have
Pin (max)=1.25*Po (max)=0.5* (Lp*Ip2)/T (5)
Because maximum ON time appear in input voltage it is minimum when, then have
Ip=Vin (min) * Tmax/Lp (6)
Substitution formula (4)
Lp=(Vin (min) * Tmax)2/(2.5*T*Po(max)) (7)
Pin (max) is the maximal input corresponding with peak power output；Po (max) is peak power output；Lp
For primary electrical inductance value；The current peak of primary inductance when Ip opens for MOSFET；
Because Po (max), T can be determined that Vin (min) will be reduced to 36VDC by given design condition, Vin (min) reduces
Amplitude be much larger than Tmax increase amplitude, so knowing that Lp will accordingly increase by formula (7).
In this optional real-time mode, it need to only reduce primary electrical inductance value, the maximum service time isallobaric device parameter of increase,
The expansion to low input working range can be realized, so as to realize safe and efficient driving plate busbar voltage electric discharge.
The above embodiments are merely illustrative of the technical solutions of the present invention rather than is limited, the ordinary skill of this area
Technical scheme can be modified by personnel or equivalent substitution, without departing from the spirit and scope of the present invention, this
The protection domain of invention should be to be defined described in claim.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (12)
- A kind of 1. drive control device, it is characterised in that including：Drive circuit, switching power circuit, wherein,The direct-flow input end of the switching power circuit is connected with the bus of the drive circuit, and the direct-flow input end is used for Operating current is obtained from the drive circuit after the drive control device power-off, until the voltage on the bus is less than or waited In the minimum operating voltage of the switching power circuit.
- 2. drive control device according to claim 1, it is characterised in that the positive pole of the direct-flow input end and the bus In the connection of P lines, the negative pole of the direct-flow input end is connected with the N lines in the bus.
- 3. drive control device according to claim 1, it is characterised in that the switching power circuit includes：Exchange input End and rectifier circuit, wherein,The ac input end is connected with the input of the rectifier circuit, the output end of the rectifier circuit with it is described straight Flow input connection.
- 4. drive control device according to claim 1, it is characterised in that the minimum operating voltage of the switching power circuit Span be 0-48VDC.
- 5. drive control device according to any one of claim 1 to 4, it is characterised in that the switching power circuit is Inverse-excitation type switch power-supply.
- 6. drive control device according to claim 5, it is characterised in that the drive control device also includes：Control circuit, Wherein,The control circuit is connected with the drive circuit and the switching power circuit, and the control circuit is used to control with PWM Switching power circuit described in Schema control processed is operated in discontinuous conduct mode.
- 7. drive control device according to claim 6, it is characterised in that the high frequency transformer in the switching power circuit Property parameters be to be configured according at least to the minimum operating voltage of the switching power circuit.
- 8. drive control device according to claim 7, it is characterised in that the property parameters include：The high frequency transformation The maximum ON time of device and the primary electrical inductance value of the high frequency transformer.
- 9. drive control device according to claim 8, it is characterised in that during the maximum conducting of the high frequency transformer Between be according to the minimum operating voltage, the secondary output voltage of the high frequency transformer, the high frequency transformer reset when Between, the umber of turn of the switch periods of the high frequency transformer and the high frequency transformer than configuration, wherein, the high frequency The umber of turn of transformer is than the armature winding number of turn and the secondary windings circle of the high frequency transformer for the high frequency transformer Several ratio.
- 10. drive control device according to claim 8, it is characterised in that the primary inductance of the high frequency transformer Value is according to the minimum operating voltage, the maximum ON time, the switch periods of the high frequency transformer and the height The peak power output configuration of frequency power transformer.
- A kind of 11. drive control device discharge control method, it is characterised in that including：After the drive control device powers off from working condition, the direct current by the switching power circuit of the drive control device is defeated Enter end and obtain operating current from the drive circuit of the drive control device, wherein, the direct-flow input end and the drive circuit Bus connection；The drive circuit is controlled to discharge；When the voltage on the bus of the drive circuit is less than or equal to the minimum operating voltage of the switching power circuit, The switching power circuit is controlled to be stopped.
- 12. according to the method for claim 11, it is characterised in that in the switching power circuit by the drive control device Direct-flow input end obtain operating current from the drive circuit of the drive control device before, methods described also includes：The switching power circuit is controlled to be operated in discontinuous conduct mode with pwm pattern, wherein, the switching power circuit For inverse-excitation type switch power-supply.
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| CN201710809568.1A CN107579652A (en) | 2017-09-08 | 2017-09-08 | Drive control device and drive control device discharge control method |
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| CN201710809568.1A CN107579652A (en) | 2017-09-08 | 2017-09-08 | Drive control device and drive control device discharge control method |
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