CN204993283U - Motor drive and possess this motor drive's motor - Google Patents

Motor drive and possess this motor drive's motor Download PDF

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Publication number
CN204993283U
CN204993283U CN201490000559.8U CN201490000559U CN204993283U CN 204993283 U CN204993283 U CN 204993283U CN 201490000559 U CN201490000559 U CN 201490000559U CN 204993283 U CN204993283 U CN 204993283U
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China
Prior art keywords
side switch
mentioned
command signal
terminal
switch command
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CN201490000559.8U
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Chinese (zh)
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坪内俊树
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/538—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16—Modifications for eliminating interference voltages or currents
    • H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
    • H03K17/162—Modifications for eliminating interference voltages or currents in field-effect transistor switches without feedback from the output circuit to the control circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/0175—Coupling arrangements; Interface arrangements
    • H03K19/017545—Coupling arrangements; Impedance matching circuits

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

The utility model discloses a motor drive (100) with the height incline switch (19) and downside switch (21) connect in series and form totem columnar order circuit in DC power supply (7). Motor drive (100) possess control part (102) of sending the high side switch command signal who is used for the switch -on / disconnection of the high side switch (19) of messenger and being used for making the downside switch command signal of downside switch (21) switch -on / disconnection. Level shift circuit (13) are located between third terminal (19c) and the high side switch command signal output terminal (102a). Sent when being used for making the downside switch command signal of downside switch (21) switch -on at downside switch command signal output terminal (102b), the high side switch command signal who is used for making after being shifted by the level of high side switch (19) disconnection is sent in level shift circuit (13) to third terminal (19c).

Description

Motor drive and possess the motor of this motor drive
Technical field
The level shift circuit that the utility model utilizes as high withstand voltage IC (HighVoltageIC) in particular to one.Level shift circuit is used in the control electrode that controllable semiconductor comprises.
Controllable semiconductor is used in the bridge circuit of the use when carrying out inverse transformation to electric power.Particularly in the semiconductor switch of upper side arm forming bridge circuit, use controllable semiconductor.The inverse transformation of electric power is such as carried out by PWM inverter, motor drive etc.The control electrode that controllable semiconductor comprises has the electrode inputted control signal being become to voltage reference.The electrode becoming voltage reference is emitter, source electrode etc.Become the electrode of voltage reference relative to common electric potential changes such as ground (ground).The control electrode being passed to controllable semiconductor for making the control signal of controllable semiconductor conducting (ON)/cut-off (OFF) and comprising.The control electrode transfer control signal that level shift circuit does not carry out current potential insulation with the circuit being connected to common electric potential and comprises controllable semiconductor.
Background technology
In the past, bridge circuit was used when carrying out inverse transformation by PWM inverter etc. to electric power.Semiconductor switch forms the upper side arm of bridge circuit.Power inverter changes and refers to DC converting as exchanging.In recent years, as described in Patent Document 1, level shift circuit is being used for making in the circuit of semiconductor switch conducts/cut-off.Level shift circuit does not carry out utilizing the current potential of transformer, photoelectrical coupler etc. to insulate.If use level shift circuit, then can reduce costs.
Fig. 6 is the structure chart of motor drive in the past.Level shift circuit is used in motor drive in the past.As shown in Figure 6, the IGBT17 as upper side arm in the bridge circuit changed for power inverter is connected in series with the IGBT18 as lower side arm.The bridge circuit of a phase comprises IGBT17 and IGBT18.The bridge circuit of a phase is between main DC power supply Vdc and common electric potential COM.Also DC power supply Vdc is called side of the positive electrode, common electric potential COM is called negative side.DC power supply Vdc is such as applied in the high voltage of 400V.
Lead-out terminal 104 is the tie point of the emitter of IGBT17 and the collector electrode of IGBT18.If IGBT17 and IGBT18 is conduction and cut-off alternately, then generate alternating electromotive force.At lead-out terminal 104 place, output AC electric power is used as generated output voltage OUT.
Negative pole as auxiliary DC power supply E2 is connected to common electric potential COM.DC power supply E2 is also referred to as drive power supply.DC power supply E2 such as supplies the voltage of 15V.Driver 20 is for making the IGBT18 conduction and cut-off of lower side arm.Driver 20 is between DC power supply E2 and common electric potential COM.
In addition, level shift circuit has been shown in Fig. 6.Level shift circuit is for making the IGBT17 conduction and cut-off of upper side arm.Level shift circuit comprises high-withstand voltage MOSFET 1 and high-withstand voltage MOSFET 2.
The input terminal 25 of high-withstand voltage MOSFET 1 receives by the Continuity signal of other circuit evolving.When high-withstand voltage MOSFET 1 receives Continuity signal, high-withstand voltage MOSFET 1 becomes conducting.If high-withstand voltage MOSFET 1 becomes conducting, then produce pressure drop at load resistance 3 place.The pressure drop produced with load resistance 3 place is for signal, and IGBT17 becomes conducting.
The input terminal 26 of high-withstand voltage MOSFET 2 as described above, receives by the pick-off signal of other circuit evolving.When high-withstand voltage MOSFET 2 receives pick-off signal, high-withstand voltage MOSFET 2 becomes cut-off.If high-withstand voltage MOSFET 2 becomes cut-off, then produce pressure drop at load resistance 4 place.The pressure drop produced with load resistance 4 place is for signal, and IGBT17 becomes cut-off.
Usually, high-withstand voltage MOSFET 1 and high-withstand voltage MOSFET 2 each other in the same manner as form.Similarly, load resistance 3 and load resistance 4 also each other in the same manner as form.Constant-voltage diode 5 is connected with in parallel with load resistance 3.Similarly, constant-voltage diode 6 is connected with in parallel with load resistance 4.Load resistance 3 and load resistance 4 protect NOT circuit (inverter circuit) 8 described later and NOT circuit 9 etc. by the generation limiting excessive pressure drop.
As shown in Figure 6, level shift circuit has the circuit part comprising high-withstand voltage MOSFET 1 and high-withstand voltage MOSFET 2 and the circuit part come by enclosed with dashed lines.
The signal that it is reference potential that the circuit part comprising high-withstand voltage MOSFET 1 and high-withstand voltage MOSFET 2 is transfused to common electric potential COM.Common electric potential COM is static.
The output voltage OUT that the circuit part come by enclosed with dashed lines produces with lead-out terminal 104 place carries out action for reference potential.The reference potential of the circuit part come by enclosed with dashed lines can change.If IGBT17 and IGBT18 conduction and cut-off, then the output voltage OUT change of lead-out terminal 104.That is, the current potential of output voltage OUT alternately follows the trail of the current potential Vdc of common electric potential COM and main DC power supply.
Exist as auxiliary DC power supply E1 in the circuit come by enclosed with dashed lines.In the same manner as DC power supply E2, DC power supply E1 is also referred to as drive power supply.
The positive pole of DC power supply E1 is connected to line Vcc1, and the negative pole of DC power supply E1 is connected to lead-out terminal 104.DC power supply E1 such as supplies the voltage of 15V.DC power supply E1 is the power supply of NOT circuit 8, NOT circuit 9, low-pass filter circuit (Low-PassFilter) 30, low-pass filter circuit 31, RS circuits for triggering (ResetSetFlip-Flopcircuit: reset-set circuits for triggering) 15, driver 16 etc.Low-pass filter circuit 30,31 is also sometimes referred to as LPF.RS circuits for triggering 15 are also referred to as RS latch cicuit (ResetSetLatchcircuit), RS-FF.
Fig. 7 is the sequential chart of the action of the motor drive represented in the past.As shown in Figure 7, the sequential represented using HIN there is shown as on the conduction and cut-off command signal of IGBT17 of side arm.The conduction and cut-off command signal of the IGBT18 as lower side arm is there is shown in the sequential represented using LIN.HIN and LIN is the signal of H level instruction conducting, L level instruction cut-off.
The pulse signal that input terminal 25,26 receives is there is shown in the sequential represented with 25,26.Pulse signal is produced by pulse generator.The pulse signal that input terminal 25,26 receives is by other circuit evolving unshowned in Fig. 6.The pulse signal shown in 25 of sequential chart is passed to high-withstand voltage MOSFET 1 when HIN signal rises as signal wide when having fixing.Similarly, the pulse signal shown in 26 of sequential chart is passed to high-withstand voltage MOSFET 2 when HIN signal declines as signal wide when having fixing.
The RS circuits for triggering 15 forming level shift circuit receive asserts signal S and reset signal R.Asserts signal S is there is shown in the sequential represented with S.Reset signal R is there is shown in the sequential represented with R.The Continuity signal of input terminal 25 is passed to RS circuits for triggering 15 via high-withstand voltage MOSFET 1 as asserts signal S.The pick-off signal of input terminal 26 is passed to RS circuits for triggering 15 via high-withstand voltage MOSFET 2 as reset signal R.RS circuits for triggering 15 send output signal Q.Output signal Q is there is shown in the sequential represented with Q.The output signal Q of H level is sent according to asserts signal S.The output signal Q of L level is sent according to reset signal R.Output state before tight is also reflected in output signal Q.
The sequential represented using 17 in the figure 7 there is shown the conduction and cut-off state of the IGBT17 as upper side arm.The conduction and cut-off state of the IGBT18 as lower side arm is there is shown in the sequential represented using 18.H level represents conducting state.L level represents cut-off state.
Output voltage is there is shown in the sequential represented with OUT.H level represents the state of output dc voltage Vdc.L level represents the state exporting GND.
As shown in Figure 7, the state in each portion of moment t=0 is as follows.That is, HIN is L level, and therefore IGBT17 becomes cut-off.LIN is H level, and therefore IGBT18 becomes conducting.Now, the current potential of the output voltage OUT of lead-out terminal 104 is GND level.
Then, as shown in Figure 7, at moment t=t1, LIN switches to L level from H level.Its result, IGBT18 is changed to cut-off from conducting.Therefore, the current potential of the output voltage OUT of lead-out terminal 104 is sharply elevated to Vdc from GND level.
Then, as shown in Figure 7, at time t=t2, HIN switches to H level from L level.Shown in the sequential chart that high-withstand voltage MOSFET 1 receives 25 time wide △ t pulse signal.The input terminal that pulse signal has to RS circuits for triggering 15 via NOT circuit 8 grade transmits asserts signal S.Its result, as the output of RS circuits for triggering 15, output signal Q sends H level.Therefore, IGBT17 becomes conducting.
Then, as shown in Figure 7, at time t=t3, HIN switches to L level from H level.Shown in the sequential chart that high-withstand voltage MOSFET 2 receives 26 time wide △ t pulse signal.The input terminal that pulse signal has to RS circuits for triggering 15 via NOT circuit 9 grade transmits reset signal R.Its result, as the output of RS circuits for triggering 15, output signal Q sends L level.Therefore, IGBT17 becomes cut-off.
Action as described above is just carried out when the level of the signal shown in HIN and LIN is switched.
Patent documentation 1: Japan Patent No. 3635975 publication
Utility model content
High-side switch and low side switch are connected in series in DC power supply to form totem pole type circuit by the motor drive of first method of the present utility model, there is control part, this control part sends for making the high-side switch command signal of above-mentioned high-side switch on-off and for making the low side switch command signal of above-mentioned low side switch on-off, the feature of this motor drive is, above-mentioned high-side switch comprises the first terminal be connected with the side of the positive electrode of above-mentioned DC power supply, the second terminal be connected with above-mentioned low side switch and receive the 3rd terminal of the above-mentioned high-side switch command signal for making on-off between above-mentioned the first terminal and above-mentioned second terminal, above-mentioned low side switch comprises the 4th terminal be connected with above-mentioned second terminal, the Five-terminals be connected with the negative side of above-mentioned DC power supply and receive the 6th terminal of the above-mentioned low side switch command signal for making on-off between above-mentioned 4th terminal and above-mentioned Five-terminals, above-mentioned control part comprises and sends the high-side switch command signal lead-out terminal of above-mentioned high-side switch command signal to above-mentioned 3rd terminal and send the low side switch command signal lead-out terminal of above-mentioned low side switch command signal to above-mentioned 6th terminal, above-mentioned motor drive has level shift circuit, this level shift circuit is between above-mentioned 3rd terminal and above-mentioned high-side switch command signal lead-out terminal, when above-mentioned low side switch command signal lead-out terminal have sent the above-mentioned low side switch command signal for making above-mentioned low side switch connect, this level shift circuit to above-mentioned 3rd terminal send for above-mentioned high-side switch is disconnected by the high-side switch command signal after level shift.
The feature of the motor drive of second method of the present utility model is, in the motor drive of above-mentioned first method, above-mentioned level shift circuit comprises: pulse generator, it sends set pulse when the above-mentioned high-side switch command signal that above-mentioned high-side switch command signal lead-out terminal sends switches to connection from disconnection, and sends reset pulse when the above-mentioned high-side switch command signal that above-mentioned high-side switch command signal lead-out terminal sends switches to disconnection from connection, and reset-set circuits for triggering, it sends above-mentioned by the high-side switch command signal after level shift for what make above-mentioned high-side switch connect when receiving the above-mentioned set pulse sent by above-mentioned pulse generator, send above-mentioned by the high-side switch command signal after level shift for what make above-mentioned high-side switch disconnect when receiving the above-mentioned reset pulse sent by above-mentioned pulse generator, wherein, when above-mentioned low side switch command signal lead-out terminal have sent for making above-mentioned low side switch switch to the above-mentioned low side switch command signal of connection from disconnection, above-mentioned pulse generator sends above-mentioned reset pulse.
The feature of motor of the present utility model is the motor drive of the either type possessed in above-mentioned first method and second method.
High-side switch and low side switch are connected in series in DC power supply to form totem pole type circuit by the motor drive that the utility model is used as object.In addition, motor drive has and sends for making the high-side switch command signal of high-side switch on-off and for making the control part of the low side switch command signal of low side switch on-off.
Particularly, high-side switch comprises the first terminal, the second terminal and the 3rd terminal.The first terminal is connected with the side of the positive electrode of DC power supply.Second terminal is connected with low side switch.3rd terminal reception is for making the high-side switch command signal of on-off between the first terminal and the second terminal.
Low side switch comprises the 4th terminal, Five-terminals and the 6th terminal.4th terminal is connected with the second terminal.Five-terminals is connected with the negative side of DC power supply.6th terminal reception is for making the low side switch command signal of the 4th on-off between terminal and Five-terminals.
Control part comprises high-side switch command signal lead-out terminal and low side switch command signal lead-out terminal.High-side switch command signal lead-out terminal sends high-side switch command signal to the 3rd terminal.Low side switch command signal lead-out terminal sends low side switch command signal to the 6th terminal.
Level shift circuit is between the 3rd terminal and high-side switch command signal lead-out terminal.When low side switch command signal lead-out terminal have sent the low side switch command signal for making low side switch connect, level shift circuit to the 3rd terminal send for high-side switch is disconnected by the high-side switch command signal after level shift.
Accompanying drawing explanation
Fig. 1 is the structure chart of the motor drive in execution mode 1 of the present utility model.
Fig. 2 is the sequential chart of the action of the motor drive illustrated in execution mode 1 of the present utility model.
Fig. 3 is the structure chart of the motor drive in execution mode 2 of the present utility model.
Fig. 4 is the sequential chart of the action of the motor drive illustrated in execution mode 2 of the present utility model.
Fig. 5 is the major part cutaway view of the motor in execution mode 3 of the present utility model.
Fig. 6 is the structure chart of motor drive in the past.
Fig. 7 is the sequential chart of the action of the motor drive represented in the past.
Embodiment
As the motor drive of execution mode of the present utility model by structure described later, when low side switch (lowsideswitch) is connected, how the state of high-side switch (highsideswitch) all makes this high-side switch disconnect.Therefore, it is possible to prevent the state that high-side switch and low side switch are connected simultaneously.Its result, can prevent because high-side switch and low side switch connect the damage of the motor drive causing main DC power supply and common electric potential to be short-circuited and to produce simultaneously.
Particularly, as described later there is pulse generator like that as the motor drive of execution mode of the present utility model and RS circuits for triggering are used as level shift circuit.
By this structure, when low side switch is connected, in pulse generator, send the reset pulse that high-side switch is disconnected.Therefore, how its state of high-side switch is all disconnected.Its result, can prevent high-side switch and low side switch from connecting simultaneously.Thus, the damage of the motor drive being short-circuited and producing because of main DC power supply and common electric potential can be prevented.
That is, the motor drive as execution mode of the present utility model is connected by preventing high-side switch and low side switch simultaneously, can improve reliability.
In addition, there is the following point that should improve in motor drive in the past.That is, as shown in Figure 7, when when the moment, t=t4, LIN switched to L level from H level, IGBT18 ends.When sharply raising at the current potential of lead-out terminal 104 place output voltage OUT due to IGBT18 cut-off, inducing at the S terminal place of RS circuits for triggering 15 is not sometimes mistake pulse according to HIN.Due to induced mistake pulse, as the output of RS circuits for triggering 15, output signal Q exports H level.Owing to exporting H level as output signal Q, therefore IGBT17 misleads.
Afterwards, when when the moment, t=t5, LIN switched to H level from L level again, IGBT18 is conducting again.Its result, IGBT17 and IGBT18 becomes conducting at upper underarm simultaneously.That is, DC power supply Vdc and common electric potential COM can be made to be short-circuited, and therefore excessive electric current flows through IGBT17 and IGBT18.Therefore, IGBT17 and IGBT18 is damaged.Or the key element sometimes forming the periphery of IGBT17, IGBT18 is also damaged.
Therefore, by the motor drive as execution mode of the present utility model described later, the high-side switch be connected in series in totem (totempole) type circuit and low side switch are protected.
Specifically, there is following situation: when low side switch disconnects, sharply raise at the lead-out terminal place current potential of the contact as high-side switch and low side switch.When the current potential of outlet side sharply raises, respond to the signal of the input side of the mistake that high-side switch misconnection of sening as an envoy to is led to sometimes.Due to the signal of the input side of this mistake, high-side switch sometimes misconnection leads to.In this condition, if low side switch is switched on afterwards, then high-side switch and low side switch can be switched on simultaneously.If high-side switch and low side switch are connected simultaneously, then DC power supply can be made to be short-circuited.Prevent the mistake on-state of this high-side switch.That is, prevent that high-side switch and low side switch become the state of connection simultaneously.
That high-side switch and low side switch damage, that reliability is high motor drive is prevented therefore, it is possible to provide.
Below, use accompanying drawing and Biao Lai that execution mode of the present utility model is described.In addition, execution mode is below the example specialized by the utility model, does not limit technical scope of the present utility model.
(execution mode 1)
Fig. 1 is the structure chart of the motor drive in execution mode 1 of the present utility model.Fig. 2 is the sequential chart of the action of the motor drive illustrated in execution mode 1 of the present utility model.
As shown in Figure 1, high-side switch 19 and low side switch 21 are connected in series in main power source 7 as DC power supply to form totem pole type circuit by motor drive 100.In addition, motor drive 100 has control part 102, and this control part 102 sends the high-side switch command signal for making high-side switch 19 turn on/off and the low side switch command signal for making low side switch 21 turn on/off.
Particularly, high-side switch 19 comprises the first terminal 19a, the second terminal 19b and the 3rd terminal 19c.The first terminal 19a is connected with the side of the positive electrode of the main power source 7 as DC power supply.Second terminal 19b is connected with low side switch 21.3rd terminal 19c receives for making the high-side switch command signal turned on/off between the first terminal 19a and the second terminal 19b.
Low side switch 21 comprises the 4th terminal 21a, Five-terminals 21b and the 6th terminal 21c.4th terminal 21a is connected with the second terminal 19b.Five-terminals 21b is connected with the negative side of the main power source 7 as DC power supply.6th terminal 21c receives for making the low side switch command signal turned on/off between the 4th terminal 21a and Five-terminals 21b.
Control part 102 comprises high-side switch command signal lead-out terminal 102a and low side switch command signal lead-out terminal 102b.High-side switch command signal lead-out terminal 102a sends high-side switch command signal to the 3rd terminal 19c.Low side switch command signal lead-out terminal 102b sends low side switch command signal to the 6th terminal 21c.
Level shift circuit 13 is between the 3rd terminal 19c and high-side switch command signal lead-out terminal 102a.When low side switch command signal lead-out terminal 102b have sent the low side switch command signal for making low side switch 21 connect, level shift circuit 13 to the 3rd terminal 19c send for high-side switch 19 is disconnected by the high-side switch command signal after level shift.
Further use Fig. 1 describes in detail.
High-side switch 19 and low side switch 21 are connected in series between the side of the positive electrode terminal of main power source 7 and negative side terminal in totem pole type.The position that second terminal 19b of high-side switch 19 is connected with the 4th terminal 21a of low side switch 21 forms lead-out terminal 104.The output voltage of this lead-out terminal 104 is represented for OUT.Lead-out terminal 104 is connected to one end of motor winding 12.The high-side switch command signal HIN sent from high-side switch command signal lead-out terminal 102a is received by the first hysteresis comparator 10.First hysteresis comparator 10 sends received high-side switch command signal HIN to level shift circuit 13.
The signal that level shift circuit 13 sends is received by the grid as the 3rd terminal 19c of high-side switch 19.The low side switch command signal LIN sent from low side switch command signal lead-out terminal 102b is received by the second hysteresis comparator 11.The grid as the 6th terminal 21c from second hysteresis comparator 11 to low side switch 21 send received by low side switch command signal LIN.
In FIG, for the drive unit of motor of motor winding with multiple phase, illustrate only the motor winding of a phase.
Use the sequential chart shown in Fig. 2 that action, the effect of the motor drive formed as described above are described.In addition, to form motor drive element annotation Fig. 1 shown in mark.
As shown in Figure 2, there is shown the high-side switch command signal for making high-side switch 19 turn on/off in the sequential represented with HIN.The low side switch command signal for making low side switch 21 turn on/off is there is shown in the sequential represented with LIN.High-side switch command signal HIN, low side switch command signal LIN are the signal that H level instruction is connected, L level instruction disconnects.
The on-off state of high-side switch 19 is there is shown in the sequential represented with 19.The on-off state of low side switch 21 is there is shown in the sequential represented with 21.About the ON/OFF state of high-side switch 19, low side switch 21, H level represents connection, and L level represents disconnection.The output voltage of the lead-out terminal 104 of the contact of the 4th terminal 21a as the second terminal 19b of high-side switch 19 and low side switch 21 is there is shown in the sequential represented using OUT.
First, the state in each portion of moment t=0 is as follows.High-side switch command signal HIN is L level.Low side switch command signal LIN is H level.High-side switch 19 disconnects.Low side switch 21 is connected.The output voltage OUT of lead-out terminal 104 is GND level.
Then, at moment t=t1, low side switch command signal LIN switches to L level from H level.Therefore, low side switch 21 becomes disconnection from connection.Its result, the output voltage OUT of lead-out terminal 104 is sharply elevated to Vdc level from GND level.
Then, at moment t=t2, high-side switch command signal HIN switches to H level from L level.Now, level shift circuit 13 works and makes high-side switch 19 become connection.
Then, at moment t=t3, high-side switch command signal HIN switches to L level from H level.Now, level shift circuit 13 works and makes high-side switch 19 become disconnection.
Above action is just repeated when the level of high-side switch command signal HIN and low side switch command signal LIN is switched.
In addition, when switching to L level at the moment t=t4 low side switch command signal LIN shown in Fig. 2 from H level, low side switch 21 disconnects.Suppose that high-side switch 19 is subject to the output voltage OUT impact jumpy of lead-out terminal 104 and connects when low side switch 21 disconnects.
But when switching to H level at next moment t=t5 low side switch command signal LIN from L level, low side switch 21 is connected.Further, meanwhile, by the effect of level shift circuit 13, high-side switch 19 disconnects.Its result, can not produce the state that high-side switch 19 is connected with low side switch 21 simultaneously.Therefore, high-side switch 19 and low side switch 21 can not be connected simultaneously, and therefore main power source 7 can not be shorted.That is, motor drive can not be damaged.
(execution mode 2)
Fig. 3 is the structure chart of the motor drive in execution mode 2 of the present utility model.Fig. 4 is the sequential chart of the action of the motor drive illustrated in execution mode 2 of the present utility model.In the various figures, identical mark is marked to the structural element identical with the structural element illustrated in execution mode 1, quotes explanation.
As shown in Figure 3, level shift circuit 13 comprises RS circuits for triggering 15 and the pulse generator 24 as pulse generator.
Pulse generator 24 as pulse generator sends set pulse when the high-side switch command signal that high-side switch command signal lead-out terminal 102a sends switches to conducting from cut-off.Pulse generator 24 sends reset pulse when the high-side switch command signal that high-side switch command signal lead-out terminal 102a sends switches to cut-off from conducting.
RS circuits for triggering 15 when receiving the set pulse sent by pulse generator 24, send for make high-side switch 22 conducting by the high-side switch command signal after level shift.RS circuits for triggering 15 when receiving the reset pulse sent by pulse generator 24, send for high-side switch 22 is ended by the high-side switch command signal after level shift.
Further, when low side switch command signal lead-out terminal 102b have sent for making low side switch 23 switch to the low side switch command signal of conducting from cut-off, pulse generator 24 sends reset pulse.
Further use Fig. 3 describes in detail.
High-side switch 22, low side switch 23 and current sense resistor 27 is connected in series between the side of the positive electrode terminal of main power source 7 and negative side terminal in totem pole type.The position that second terminal 22b of high-side switch 22 is connected with the 4th terminal 23a of low side switch 23 forms lead-out terminal 104.The first terminal 22a of high-side switch 22 is connected with the side of the positive electrode terminal of main power source 7.The Five-terminals 23b of low side switch 23 is connected with the negative side terminal of main power source 7 via current sense resistor 27.The output voltage of this lead-out terminal 104 is represented for OUT.Lead-out terminal 104 is connected to one end of motor winding 12.MOSFET can be utilized to form high-side switch 22 and low side switch 23.
The high-side switch command signal HIN sent from high-side switch command signal lead-out terminal 102a is received by the first hysteresis comparator 10.First hysteresis comparator 10 sends received high-side switch command signal HIN to the input terminal 124 of the pulse generator 24 forming level shift circuit 13.The lead-out terminal 125 of pulse generator 24 is connected to the grid of the first high-withstand voltage MOSFET 1.The lead-out terminal 126 of pulse generator 24 is connected to the grid of the second high-withstand voltage MOSFET 2.
The drain electrode of the first high-withstand voltage MOSFET 1 is connected to load resistance 3.The drain electrode of the first high-withstand voltage MOSFET 1 is connected to set input 127 of RS circuits for triggering 15.The drain electrode of the second high-withstand voltage MOSFET 2 is connected to load resistance 4.The drain electrode of the second high-withstand voltage MOSFET 2 is connected to the RESET input 128 of RS circuits for triggering 15.
The lead-out terminal 129 of RS circuits for triggering 15 is connected to the grid as the 3rd terminal 22c of high-side switch 22 via the first amplifier 28.
Pulse generator 24, first high-withstand voltage MOSFET 1, second high-withstand voltage MOSFET 2, load resistance 3, load resistance 4, RS circuits for triggering 15 and the first amplifier 28 are the key elements forming level shift circuit 13.
The low side switch command signal LIN sent from low side switch command signal lead-out terminal 102b is received by the second hysteresis comparator 11.Second hysteresis comparator 11 to form level shift circuit 13 pulse generator 24 the RESET input 130 send received by low side switch command signal LIN.In addition, the second hysteresis comparator 11 via the grid as the 6th terminal 23c from the second amplifier 29 to low side switch 23 send received by low side switch command signal LIN.
In figure 3, for the drive unit 100 of motor of motor winding 12 with multiple phase, illustrate only the motor winding of a phase.
Use the sequential chart shown in Fig. 4 that action, the effect of the motor drive formed as described above are described.In addition, to form motor drive element annotation Fig. 3 shown in mark.
As shown in Figure 4, there is shown the high-side switch command signal for making high-side switch 22 conduction and cut-off in the sequential represented with HIN.The low side switch command signal for making low side switch 23 conduction and cut-off is there is shown in the sequential represented with LIN.High-side switch command signal HIN, low side switch command signal LIN are the signal of H level instruction conducting, L level instruction cut-off.
The pulse signal OUT1 sent from the lead-out terminal 125 of pulse generator 24 is there is shown in the sequential represented with 125.The pulse signal OUT2 sent from the lead-out terminal 126 of pulse generator 24 is there is shown in the sequential represented with 126.When high-side switch command signal HIN rises, pulse signal OUT1 wide when having fixing from lead-out terminal 125 transmission.The pulse signal OUT1 sent from lead-out terminal 125 is received by high-withstand voltage MOSFET 1.When high-side switch command signal HIN declines, pulse signal OUT2 wide when having fixing from lead-out terminal 126 transmission.The pulse signal OUT2 sent from lead-out terminal 126 is received by high-withstand voltage MOSFET 2.
The sequential chart represented with S is the set pulse that set input 127 that RS circuits for triggering 15 comprise receives.The pulse signal OUT1 sent from pulse generator 24 transmits via high-withstand voltage MOSFET 1 and obtains by set pulse.
The sequential chart represented with R is the reset pulse that the RESET input 128 that RS circuits for triggering 15 comprise receives.The pulse signal OUT2 sent from pulse generator 24 transmits via high-withstand voltage MOSFET 2 and obtains by reset pulse.RS circuits for triggering 15 are the key elements forming level shift circuit 13.
The sequential chart represented with Q shows the output signal Q of lead-out terminal 129 transmission comprised from RS circuits for triggering 15.If set input 127 receives set pulse, then export H level as output signal Q.If the RESET input 128 receives reset pulse, then export L level as output signal Q.
Conducting, the cut-off state of high-side switch 22 is there is shown in the sequential represented with 22.Conducting, the cut-off state of low side switch 23 is there is shown in the sequential represented with 23.About the conduction and cut-off state of high-side switch 22, low side switch 23, H level represents conducting, and L level represents cut-off.
The output voltage of the lead-out terminal 104 of the contact of the 4th terminal 23a as the second terminal 22b of high-side switch 22 and low side switch 23 is there is shown in the sequential represented using OUT.
In addition, the grid as the 6th terminal 23c comprised to low side switch 23 via the second amplifier 29 transmits low side switch command signal LIN.Low side switch command signal LIN is also imported into the RESET input 130 that pulse generator 24 comprises.When low side switch command signal LIN rises to H level from L level, send pulse signal OUT2 from the lead-out terminal 126 of pulse generator 24 and be used as reset pulse.
As shown in Figure 4, the state in each portion of moment t=0 is as follows.High-side switch command signal HIN is L level.Low side switch command signal LIN is H level.High-side switch 22 ends.Low side switch 23 conducting.The output voltage OUT of lead-out terminal 104 is GND level.
Then, at moment t=t1, low side switch command signal LIN switches to L level from H level.Therefore, low side switch 23 becomes cut-off from conducting.Its result, the output voltage OUT of lead-out terminal 104 is elevated to Vdc level sharp from GND level.
Then, at moment t=t2, high-side switch command signal HIN switches to H level from L level.Now, the set pulse of wide Δ t when having from lead-out terminal 125 transmission of pulse generator 24.Set pulse is delivered to set input 127 of RS circuits for triggering 15 via high-withstand voltage MOSFET 1 etc.When set input 127 receives set pulse, the lead-out terminal 129 of RS circuits for triggering 15 is switched to H level.Its result, carries out effect and makes high-side switch 22 become conducting.
Then, at moment t=t3, high-side switch command signal HIN switches to L level from H level.Now, the reset pulse of wide Δ t when having from lead-out terminal 126 transmission of pulse generator 24.Reset pulse is delivered to the RESET input 128 of RS circuits for triggering 15 via high-withstand voltage MOSFET 2 etc.When the RESET input 128 receives reset pulse, the lead-out terminal 129 of RS circuits for triggering 15 is switched to L level.Its result, carries out effect and makes high-side switch 22 become cut-off.
Next, at moment t=t3a, low side switch command signal LIN switches to H level from L level.Low side switch command signal LIN is passed to the 6th terminal 23c of low side switch 23 via the second amplifier 29.Low side switch 23 switches to conducting from cut-off.Meanwhile, the low side switch command signal LIN sent from low side switch command signal lead-out terminal 102b to be delivered to the RESET input 130 of pulse generator 24 via the second hysteresis comparator 11.If the RESET input 130 receives low side switch command signal LIN, then send reset pulse from the lead-out terminal 126 of pulse generator 24.
Above action is just repeated when the level of high-side switch command signal HIN and low side switch command signal LIN is switched.
In addition, when switching to L level at the moment t=t4 low side switch command signal LIN shown in Fig. 4 from H level, low side switch 23 ends.There is following situation: when low side switch 23 ends, be subject to the output voltage OUT impact jumpy of lead-out terminal 104 and induce pulse by mistake at set input 127 places of RS circuits for triggering 15.Pulse is not caused by high-side switch command signal HIN by mistake.Suppose the impact due to pulse by mistake, the lead-out terminal 129 of RS circuits for triggering 15 is switched to H level.Therefore, high-side switch 22 misleads.
Then, when again switching to H level from L level at moment t=t5 low side switch command signal LIN, low side switch 23 conducting.
In addition, when low side switch command signal LIN rises, low side switch command signal LIN is also passed to the RESET input of pulse generator 24.Therefore, reset pulse is sent from the lead-out terminal 126 of pulse generator 24.The reset pulse sent makes RS circuits for triggering 15 reset.When RS circuits for triggering 15 are reset, the lead-out terminal 129 of RS circuits for triggering 15 switches to L level from H level.That is, the high-side switch 22 originally misleaded ends.
Its result, can not produce the state of high-side switch 22 and low side switch 23 conducting simultaneously.Therefore, high-side switch 22 and low side switch 23 can not conductings simultaneously, and therefore main power source 7 can not be shorted.That is, motor drive can not be damaged.
(execution mode 3)
Fig. 5 is the major part cutaway view of the motor in execution mode 3 of the present utility model.
As shown in Figure 5, motor 50 has rotor 60 and stator 70 in the inside of housing 52.
Axle 64 is installed on rotor 60 in the mode of through rotor core 62.Axle 64 is rotatable by pair of bearings 66.
In stator 70, stator core 72 is wound with winding 74.When to winding 74 flow quantity control electric current, in stator core 72, produce magnetic field.By this magnetic field, rotor 60 rotates.
Be provided with in the inside of housing 52 and control substrate 54.Controlling the circuit realizing the motor drive illustrated in execution mode 1,2 is installed in substrate 54.
According to this structure, can realize playing the motor of the action effect illustrated in execution mode 1,2.
Utilizability in industry
The drive unit of motor of the present utility model by having level shift circuit, the injury of the misoperation protecting the high-side switch that forms totem pole type circuit and low side switch to cause from the action because of each switch.That is, the high-side switch that is connected in series and low side switch conducting simultaneously can be avoided.Therefore, it is possible to the motor drive providing reliability high.The utility model, except being applied to except motor drive, can also be applied to the drive unit of the various inverter apparatus that can use level shift circuit.
Description of reference numerals
1: high-withstand voltage MOSFET; 2: high-withstand voltage MOSFET; 3,4: load resistance; 5,6: constant-voltage diode; 7: main power source (DC power supply); 8,9:NOT circuit; 10: the first hysteresis comparators; 11: the second hysteresis comparators; 12: motor winding; 13: level shift circuit; 15:RS circuits for triggering; 16,20: driver; 17,18:IGBT; 19,22: high-side switch; 19a, 22a: the first terminal; 19b, 22b: the second terminal; 19c, 22c: the 3rd terminal; 21,23: low side switch; 21a, 23a: the 4th terminal; 21b, 23b: Five-terminals; 21c, 23c: the 6th terminal; 24: pulse generator (pulse generator); 25,26,124: input terminal; 27: current sense resistor; 28: the first amplifiers; 29: the second amplifiers; 30,31: low-pass filter circuit; 50: motor; 52: housing; 54: control substrate; 60: rotor; 62: rotor core; 64: axle; 66: bearing; 70: stator; 72: stator core; 74: winding; 100: motor drive; 102: control part; 102a: high-side switch command signal lead-out terminal; 102b: low side switch command signal lead-out terminal; 104,125,126,129: lead-out terminal; 127: set input; 128,130: the RESET input.

Claims (3)

1. a motor drive, high-side switch and low side switch are connected in series in DC power supply to form totem pole type circuit, there is control part, this control part sends for making the high-side switch command signal of above-mentioned high-side switch on-off and for making the low side switch command signal of above-mentioned low side switch on-off, the feature of this motor drive is
Above-mentioned high-side switch comprises the second terminal that the first terminal that is connected with the side of the positive electrode of above-mentioned DC power supply is connected with above-mentioned low side switch and the 3rd terminal receiving the above-mentioned high-side switch command signal for making on-off between above-mentioned the first terminal and above-mentioned second terminal
Above-mentioned low side switch comprises the Five-terminals that the 4th terminal that is connected with above-mentioned second terminal is connected with the negative side of above-mentioned DC power supply and the 6th terminal receiving the above-mentioned low side switch command signal for making on-off between above-mentioned 4th terminal and above-mentioned Five-terminals
Above-mentioned control part comprises and sends the high-side switch command signal lead-out terminal of above-mentioned high-side switch command signal to above-mentioned 3rd terminal and send the low side switch command signal lead-out terminal of above-mentioned low side switch command signal to above-mentioned 6th terminal,
Above-mentioned motor drive has level shift circuit, this level shift circuit is between above-mentioned 3rd terminal and above-mentioned high-side switch command signal lead-out terminal, when above-mentioned low side switch command signal lead-out terminal have sent the above-mentioned low side switch command signal for making above-mentioned low side switch connect, this level shift circuit to above-mentioned 3rd terminal send for above-mentioned high-side switch is disconnected by the high-side switch command signal after level shift.
2. motor drive according to claim 1, is characterized in that,
Above-mentioned level shift circuit comprises:
Pulse generator, it sends set pulse when the above-mentioned high-side switch command signal that above-mentioned high-side switch command signal lead-out terminal sends switches to connection from disconnection, and sends reset pulse when the above-mentioned high-side switch command signal that above-mentioned high-side switch command signal lead-out terminal sends switches to disconnection from connection; And
Reset-set circuits for triggering, it sends above-mentioned by the high-side switch command signal after level shift for what make above-mentioned high-side switch connect when receiving the above-mentioned set pulse sent by above-mentioned pulse generator, send above-mentioned by the high-side switch command signal after level shift for what make above-mentioned high-side switch disconnect when receiving the above-mentioned reset pulse sent by above-mentioned pulse generator
Wherein, when above-mentioned low side switch command signal lead-out terminal have sent for making above-mentioned low side switch switch to the above-mentioned low side switch command signal of connection from disconnection, above-mentioned pulse generator sends above-mentioned reset pulse.
3. a motor, is characterized in that, possesses motor drive according to claim 1 and 2.
CN201490000559.8U 2013-04-09 2014-04-02 Motor drive and possess this motor drive's motor Expired - Lifetime CN204993283U (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013080943A JP2016115951A (en) 2013-04-09 2013-04-09 Motor driver and electric motor including the same
JP2013-080943 2013-04-09
PCT/JP2014/001918 WO2014167804A1 (en) 2013-04-09 2014-04-02 Motor drive device, and motor provided with same

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CN201490000559.8U Expired - Lifetime CN204993283U (en) 2013-04-09 2014-04-02 Motor drive and possess this motor drive's motor

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CN (1) CN204993283U (en)
WO (1) WO2014167804A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110120800A (en) * 2018-02-07 2019-08-13 新唐科技股份有限公司 The half-bridge circuit driving chip of tool protection circuit and its guard method

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JP3650385B2 (en) * 1995-07-12 2005-05-18 株式会社ルネサステクノロジ Output buffer circuit
JP4382312B2 (en) * 2001-09-05 2009-12-09 三菱電機株式会社 Drive control device, power conversion device, power conversion device control method, and power conversion device use method
JP2007243254A (en) * 2006-03-06 2007-09-20 Matsushita Electric Ind Co Ltd Switch element driving circuit
JP4339872B2 (en) * 2006-05-25 2009-10-07 株式会社日立製作所 Semiconductor element driving device, power conversion device, motor driving device, semiconductor element driving method, power conversion method, and motor driving method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110120800A (en) * 2018-02-07 2019-08-13 新唐科技股份有限公司 The half-bridge circuit driving chip of tool protection circuit and its guard method

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