TW200812213A - Single-stage driving circuit for linear piezoelectric ceramic motor - Google Patents

Abstract

In this invention study develops of high step-up and high order resonant driving circuit for linear piezoelectric ceramic motor (LPCM). The LPCM, which usually operates at ultrasonic wave, has been widely used in many practical applications due to their merits of smaller dimension and high-holding force than the classic electromagnetic motors. The traditional driving circuit for the LPCM consists of a dc/dc converter and a dc/ac inverter, so that it usually needs two control circuits to achieve the speed regulation. However, the amplitude of ac output voltage should been effect by the variable load. In this invention, the linear piezoelectric ceramic motor drive is designed based on the high voltage gain property converter for regulating the LPCM speed and the high order resonant inverter to attenuate the effect of time-varying system parameters and load variations. Though the circuit is made up of converter and inverter with five switches, it only uses a controller to work. Analysis and experiment results are presented to demonstrate the performance of the proposed strategy of actual making.

Description

200812213 IX. Description of the Invention: TECHNICAL FIELD The technical field to which the present invention relates is applied to a power conversion circuit required for driving a linear piezoelectric motor by using a range of power electronics. The first low-voltage power supply of the first husband 2 is boosted to the DC high-voltage circuit, and then the high-order principle is used to convert the high-voltage electric current into a high-frequency stable AC sinusoidal voltage diode to provide the electric power required for the linear piezoelectric ceramic motor. [Prior Art] Linear piezoelectric ceramic motor (linear piezoelectric (10) mic deleted r pc = is the conversion of electrical energy into mechanical energy, its structure is different from the driving original and the traditional electromagnetic motor' has high torque, low speed and electromagnetic interference, etc. Therefore, it is the actuator of the county, not suitable for shovel, and the drive device with high torque Tan spoon (four) two (10). Figure 1 shows the mechanical structure of the line type: tile. The electric generation of the electric ceramics - some machines: the material on the electro-mechanical material will resist the elastic vibration formed by the 掇舻 疋 or 疋 双 以 to obtain the friction, and then use the friction driving force to form the movement, The motor itself is a four-thick-thick flat plate structure, four electrodes", n attached to the front side and respectively 舜芸v such as a checkerboard-like single-electrode. The needle 2: four is one of the surfaces, while the reverse side is completely covered. The two _== poles are connected by wires, and their travel control.:=Two pairs of pairs take one of the applications, as positive and negative reverse electrodes via a variable-variable resonant inverter variable 200812213 = After grounding. The movement of the linear piezoelectric ceramic t motor is Limited to the four gamma n translation coefficient support impeachment, these bombs # along the long side of the motor = ceramics, and there is no movement in the direction of the joint, only the ceramic rotor in the y two hard material to adhere The agent is bonded to the piezoelectric ceramic short i-force 2: there is a tight (four) electric pottery in the middle of the short side of the crucible. So the 'pre-force spring can provide a pressure between the turntables' friction will be generated on the platform and rotate Between the children, the rotator can transfer the force to the platform and move it. When the AC::: drive [T] frequency is equal to the natural resonant frequency of the piezoelectric ceramic, the amplitude motor parameter is nonlinear. Time-varying characteristics, such as inapplicable speed, low electromechanical conversion efficiency (about 35~45%), in addition to its resistance =, the operation is susceptible to temperature rise, and its dynamic model has a nonlinear disk history _ 'so m LP c Μ drive circuit and its control motor performance requirements are higher, generally academic or industry J string: coffee composition of the basic structure. Because the piezoelectric element - two = load changes 'must so must deviate from the resonance frequency and add the horse Look back 'adjust the input voltage with a closed loop, The power is released, 'but the response control of the high frequency feedback is not easy to handle, the two peaks of the peak and the peak, especially in the high speed operation, the electric coffee problem, but the second feedback to control the quality factor IV degree two rules Research clothes, machine source, sub-harmonic inverter 200812213 [3] 'Successfully solve the bottleneck of the above amplitude and phase, to change the switching frequency to adjust the rotation speed, but the output voltage harmonic component and the circulation ratio is too high. To improve Spectral wave and circulation problems, combined with high-order LLCC resonant inverters with series resonance and parallel resonance [4], when the switching frequency is limited to the geometric mean frequency, almost no loop flows through the switch, and two-phase AC The voltage amplitude and phase are not susceptible to load changes. The above-described rotary piezoelectric ceramic motor maintains a constant value of the two-phase AC voltage and the phase 2, and controls the rotation speed by using different switching frequencies. Subsequent development applied to the linear piezoelectric ceramic motor drive device, using only one set of AC voltage, but its mechanical resonance is multi-point dispersed, so it is necessary to use the amplitude control [5], by adding the rigid-stage variable boost type commutation The voltage of the device controls the vibration of the LLCC inverter. The voltage gain of the inverter is only about 1 273 times. The voltage of the front stage must be raised to high voltage to be controlled. In order to reduce the voltage of the front stage, the energy control principle of effectively controlling the amplitude of the series vibrations [6] and the higher order of the gain of the higher inverter are successively published. LPC_dynamic controller has developed to this point, / two: into the key technology, however, the above documents must be two sets of independent control = to complete the two-level architecture adjustment requirements, while limited by; go out = low, does not discuss the drive circuit The conversion efficiency is due to the fact that the motor drive unit must be miniaturized towards high efficiency to meet the needs of the micro-electromechanical industry. The order of the single-stage architecture of the line u is the line-type l electric pottery bow bow Yuanzhai + road The pre-converter circuit adopts a thousand n * J and the motor slams the electric switch to control the boost value 7 in a large range; "construction" uses only one low-cause, converts the direct current into high-bee = high The sinusoidal voltage waveform of the parent of the spectrum oscillator. The switching frequency of the later stage 200812213 is two-points of the ^ level, and is the same phase trigger, so it can share a control 1 with the first-class converter (:, greatly simplify the two sets of control ic ' required for the above documents) The polar body has the characteristics of flexible switching. [Invention] The single-stage linear piezoelectric ceramic motor driving circuit of the present invention includes a DC input circuit 101 of a low voltage power supply; The primary side circuit 102 composed of the primary side winding A and the low voltage switch a is mainly for the purpose of conducting current of the primary side winding core; a first clamping diode A, a second clamping diode A and a clamping capacitor q are matched. The clamping circuit 1 corrects the voltage of the low-voltage switch 0; the secondary side circuit 1G3 composed of the secondary side winding ^ and the medium dust capacitor 02, the circuit is respectively boosted by the low-voltage switch Q and the off-time is boosted; The high voltage circuit 105 composed of the pole body and the high voltage capacitor Q' provides the power required by the rear stage inverter. The full bridge inverter circuit composed of four high voltage power semiconductor switches m is responsible for the high voltage power. The DC voltage of 1〇5 is switched into the AC square wave voltage required for the high-order resonant circuit; a high-order spectral circuit 107 composed of a series resonant inductor 4, a parallel resonant inductor core, a series resonant capacitor Q, and a parallel resonant capacitor & The high-voltage square wave is filtered into a sine wave by using a high-order spectral vibration principle. A control driving circuit 1〇6 converts the speed control command into driving signals required for five switches and uses up, D _ switch cutting: traveling direction In addition, in order to make the follow-up instructions easier to understand, the proper nouns are not too long, and the circuit attribution figure number (such as ... circuit 1〇1) is omitted, and the description can be directly compared with the description. 11 200812213 Low voltage When the switch Q and the full bridge switch ρβ_ are turned on, the low voltage switch q provides the primary side winding A excitation current l and the induced current & path, the induced secondary side winding current / Z2, traverses the series medium voltage capacitor c2 and the high voltage two The polar body and the full bridge switch 仏+, & _ path, give the power supply required for the positive half cycle of the resonant inverter. When the low voltage switch Q is cut off, the full bridge switch + and still continue to conduct, the clamp circuit absorbs The primary side winding leaks energy and fixes a low voltage to protect the low-turn switch Q. The leakage inductance energy is reduced, and the coupled inductor excitation energy is transmitted to the primary side winding A, so the winding releases energy to the medium voltage capacitor q. When the low-voltage switch Q is turned on again, the full-bridge switch commutates to be connected to the 仏, the inverter is the beginning of a cycle, and the inverter output becomes the voltage of the AC negative half-cycle. The low-voltage switch is connected to the full bridge. The same controller drives, the low-voltage switching frequency is 80kHz, so the full-bridge switching frequency is two-points of the low-voltage switch; and the _inductor-secondary circuit and the _coupled inductor are a high air gap high excitation The current double winding. The text is reversed, using the transformer turns ratio is different, the barrier voltage fish low pressure is less difficult (four) large, the high voltage side is opposite. It can be used to absorb the line inductance energy, and can accommodate the coupled inductance energy. The absorbed energy can be used to boost the voltage. When the leakage conductor switch is turned on, the force side half current path of the secondary circuit is The second clamped two poles used: the secondary capacitor of the winding and the secondary side circuit of the coupled inductor; the pressure: the difference between the voltage of the clamp and the voltage of the clamp capacitor::: at the high voltage capacitor Therefore, the required withstand voltage is lower than the wheel-out diode guide circuit. + and the external installation of cushioning 200812213 single-stage linear piezoelectric ceramic motor drive circuit waveform timing and circuit operation mode, as shown in Figure 3 and Figure 4, circuit components related to the tea test 4 (a) Equivalent circuit diagram, the detailed working principle is as follows: Mode 1: Time low voltage switch 0 and full bridge switch ρ Conduction for a period of time: Figure 4 (b) At the beginning of this mode, low voltage switch a has been turned on for a period of time, guidance = The DC input circuit to the coupled inductor is the primary winding and the current. The current includes the excitation current ^ and the induced current & The induced current (which will pass through the magnetic circuit that consumes the inductance, sensed to the secondary side of the light-inductive inductor, and the electric current of the winding is induced to be a positive voltage at the polarity of the winding, and is connected in series with the secondary-side piezoelectric 2 capacitor. Therefore, the series voltage is higher than the high voltage capacitor & 2% - the ribbed supply loop, when the high-order resonance is defeated by % +, the AC output voltage ^ is the current required for the positive half-cycle, which makes the coupled inductor 7; the primary winding匝%% tfr & AT 甘广如句Μ, the number of ε of the secondary winding turns is m-number ratio, engages ^LJ(Lk+Lm) 疋 meaning that 夂 is the magnetizing inductance, 4 is the primary winding z (1 When conducting, the sense of the equivalent voltage of the -second side magnetizing inductance'. Low voltage on (4) = kVIN "Mazhong factory / tv is the ink of the DC input circuit, this day, -a (2) voltage vZ2 is $ primary side Winding 矣 induction VL2 nv

Ll

nkVIN (3) Specifically, the relationship between current L and other currents is 200812213 iL2=ix/n = iu-iLm<iLi In addition, low voltage switch current / (4) (four) medium voltage capacitor Q, but its: far: two The current climb rate is limited by the leakage inductance on both sides, because the second = 'and the coupling coefficient 々 is easy to design close to 丨, , ", because m, to simplify the calculation 1;; ^ wheel, the pressure effect ratio is not high and white If the person is stunned, the voltage of the high voltage circuit can be expressed as 电2, so the voltage &

Vh = + vC2 =nVIN+ vC2 Mode 2: Time “弋”; low-voltage switch Q trigger signal cut-off instant, full switch, 仏 _ continuous conduction · Figure 4 (c) This mode starts from the low-voltage switch Q trigger signal cut-off instant, coupling The secondary winding core of the inductor is limited by the leakage inductance, and the current 仏 continues to flow. The current path is changed to charge the parasitic capacitance of the low-voltage switch Q. The electric current of the secondary circuit is also due to the leakage energy of the winding. Release, still continue to flow to the full bridge switch 仏+ and δ with high voltage diode %. When the voltage vMl across the low voltage switch β gradually rises, the reverse bias voltage of the first clamped diode is gradually reduced. The mode ends at voltage vDiS1 higher than the clamp capacitor ς voltage vcl. Mode 3: Time (〖2-^); Secondary side current L steering, first clamp diode A conduction and full bridge switch +, & Conduction: Figure 4(d) When the voltage of the low-voltage switch α is higher than the clamp capacitor q voltage vci, the first clamp diode A is turned on, guiding the primary side winding current / L1 to the clamp capacitor ς, the capacitor is a high High-capacity capacitor with good frequency response, so fast 14 200812213 Guide low voltage open Βΐ current to the capacitor, so the voltage % can be regarded as a stable low-wavelength DC voltage 'to suppress the maximum value of the low-voltage switching voltage, and the switch withstand voltage is equal to the voltage of the first clamp diode a, the voltages of the two clamp each other , the duty cycle for turning on the low-voltage switch is Θ, then the voltage relationship is VC1 = VLm + ^IN = ^IN /(1 ~ = V〇sl (6) After releasing the secondary side winding puncture energy, the current is At the beginning of this mode, the current is from the primary side excitation current / ^ release energy, induced to the secondary side current L, flows out from the non-polar point and charges the high voltage capacitor. And because the current L rises slowly from zero, its path just complements The reverse recovery current of the high voltage diode required to be cut off and the current of the parasitic capacitance released before the second clamp diode is turned on, and the two diodes are clamped to each other, and have low reverse recovery current characteristics. In order to achieve the key technology of high-efficiency commutation, the two diodes are subjected to a voltage across the voltage. The voltage below the high voltage circuit can be expressed as ^DO = VD2 ~~VC\^four m'. 4) 'The second clamp two Polar Body & Conduction and Full Bridge Pass &+, & - Continuous Conduction: Figure 4(e) Japanese sect is in the first - citrus diode & conduction and high voltage diode 仏 1 day deadline, Coupling electric salty sputum stomach sputum, one side squat group, the other, the two sides of the two sides of the two windings, the three sets of windings, the three sets of electricity, "丨1^1 performance to clamp the capacitor 匸丨, the secondary side more charge Γ: 2Γ clamp diode D丨 and a loop to the center capacitor (ΐ: Γ winding dust ● at the non-polar point voltage is positive... 15 200812213 vl\ = ViNd / (1 (8) therefore medium voltage capacitor c2 The voltage can be calculated as VC2-VL2^VJNnd/(l^cl). The above equation is taken into the equation 〇(9) (ίο) V^=nViN+vC2^VINn/(l^d). Find the voltage for the converter part. The gain ~ is expressed as follows: Gn=VHfViN^/(l_d) Chengxin i type (6), formula (ι 1) draws the inverter voltage gain ^, low voltage switch one again, i ~ 1 铋 low voltage switch duty cycle J relationship curve 5 = ^ The same E-number ratio and duty cycle design, the present invention is higher than the surface-inductance structure of the reference [8]. Mode 5··Time (W5);—Secondary current~steering and continuous conduction: Figure 4(f) 么+ Since the clamp capacitor voltage VC1 has been charged for a while, when the leakage inductance energy of the primary winding is exhausted, the primary side When the current is turned, the timing of this mode is started. According to the charge balance original g, the clamp (four) capacitor electricity. The discharge current will flow back to the primary winding of the coupled inductor and the DC input circuit, and continue to charge the medium voltage capacitor q. When the winding currents L and L are equal in series, the first clamp diode A is turned off. L1, mode hex·time - /^), low-voltage switch 0 is turned on instantaneously, full-bridge switch 2, cut-off · Figure 4 (g) At this time, low-voltage switch Q is turned on again 'Because the first clamped diode is 1 can use low voltage Xiaoji diode, when the low-voltage switch Q is turned on, immediately reverses the reverse current of almost no 2008 200812213, and also fluctuates the f π-, the secondary side leakage inductance, and the variation rate of the two series currents b and 匕2, thus suppressing the current ^ The rate of rise, as well as the current /i2, takes time to zero. 'Low-voltage switch 0 cannot take any three paths from the primary side + the secondary circuit, the secondary side circuit and the first clamped diode A. The flow naturally forms a zero current switching characteristic. (Zcsw匕 circuit current still maintains the input power circuit, but gradually reduces the towel, so the invention is low. The switch Q has flexible switching when turned on, and clamps to low voltage characteristics when turned off. The earth is in the full bridge inverter, Guan Guan ^ ^ w Wang "switch drive signal, k attached to the same low voltage switch Q - controller and cut off, but the other - group full bridge open = & +, & _ still not turned on, due to the output AC voltage% In phase with the input inverter output = square wave voltage [4], In order to start the negative half cycle AC voltage waveform. The second string of white oscillators, there is still current after the current, four bridge switches 2: electricity grid charge and discharge, its current will gradually lead to switch 1 and & - natural The switch is turned on with the flywheel diode of the _, and then ends this mode. =^7·Time (&_&) Low-voltage switch (10) continues to conduct, full-bridge switch 仏+ conduction: Figure 4 (h) dry, pressure The switch Q current "is higher than the excitation current to capture, the secondary winding starts to sense the energy from the secondary winding, and the high voltage circuit is charged, and the pressure converter portion returns to mode one." For the square f, since the full bridge switch & + and the flywheel of the two - autumn =, pass 'at this time, the switch has zero voltage switching effect (zvs), the resonant inductor 4 current also begins to reverse, continue high-order resonance The parent voltage of the circuit is negative for a half cycle. From mode to mode 7, the high-boost converter is switched to the -12212213-cycle switching mode, but the high-voltage converter is reluctant to the inverter. Period = two cents after the end, will return to the inverter - week = The high-resolution analysis of the principle of LCC resonance is as follows, so that the cutoff rate is %, the resonance voltage gain of the 疋 为 is the value of the wheel 二 值%_) and the input square wave voltage peak factory ratio L private i V 〇 peak The ratio of the 哔 value to the 哔 为 is the piezoelectric ceramic motor load resistance, according to the impedance divider type ^ g g - K2 and the phase value of the input square wave voltage and the AC voltage %...] ^O(max) ^ 4 /

1 + ^ + ^

Cs Lp ω^Ιρ〇3: shout Ψ - tan'

\ ❻sL$C p + J [Call-1] ) \ L & cosRlCs J (12) 1 + ^- +

LIlAT -cosLsCp (13)

Cs Lp 〇^Lpcs The above equations 4 and Z are the sense values of the series inductor and the shunt inductor, respectively, and c and c are the capacitance values of the series capacitor and the shunt capacitor, respectively. Let the resonance (four) value ^ condition and the geometric mean frequency /, -l / (2 ^ V ^ C;) g (14, and make the full bridge switching frequency equal to the geometric mean frequency △, and formula (12) and (13) can be simplified to GV2 = 4 / λ γ = 1.273 Α (15) (16) Figure 6 shows the voltage gain curve of the high-order resonant circuit, the response of the voltage gain gF2 to different switching frequencies 由 by different loads 18 200812213. According to the eight analysis, when operating at the geometric mean frequency, the voltage gain is: fixed at 4/ττ. Only for 4 and = physical consumption due to the composition of the material effect impedance == rate is zero when operating, the same reason... The parallel equivalent resistance of the composition =:... Therefore, the square wave power _ after 'the entire high-order spectral impedance is left with the load resistance, the basic wave component directly crosses the load end, so it is not used to drive the piezoelectric ceramic motor' Authorization adjustment: Finally, the condition of the overall resonance voltage gain Gn is obtained. At that time, the peak value of the output AC voltage core and the DC input power capacitance transfer equation are as follows: the whole (17) ^V3 ^O(max) \^in -4/?/7r(ld) [Embodiment] The present invention is a linear piezoelectric ceramics As far as the design of the required driving power supply is concerned, the frequency is 4GkHz, so the full-bridge switching frequency disk is set as follows and the value of the spectral element is calculated. In the high-boost commutation, the multiplier is 80kHz. Drives the piezoelectric ceramics to the highest voltage of 27〇Vrms. According to the above voltage gain equation, the electric dust of the high-voltage circuit is reversed to 300V. The AC voltage of the piezoelectric (four) motor is driven (m = the following (four) starts to stop Movement, it is necessary to provide a lower AC voltage to ensure the stop state, so the high voltage DC voltage is specified between 72v~3〇〇v, 19 200812213 can meet the voltage range of the piezoelectric ceramic motor global drive. The detailed specifications are as follows : vIN ·· uv. K" : 72V~300V. Switching frequency: DC/DC: 80kHz; DC/AC: 40kHz Linear piezoelectric ceramic motor Specifications: 1·Double-head output; 2. Power supply: up to 270Vrms, 40kHz; 3. Rated power: 10W; 4. Piezoelectric ceramic motor equivalent capacitance: 2nF. Resonant inductance: heart = heart = 1320 〆 /. Resonant capacitance: Q = CV = 12nF (including piezoelectric ceramic motor equivalent capacitance). Inductance: is: 4 = 100 to / / ; L2 = 3.6m / / ; : 7V2 = 18 : 108 ; ] < : two 0.95 ; Core : ΕΙ 〇 MOSFET : Q : IRF4710 () ^ = 100V, ((5) = 0 014 Ω, TO -220) Qa.Qa-Qb.Qb- : IRF840(Fd,=500V ^ RDS{ON)=0AQ ^ TO-220) Diode:

Dr D2: STPS20H100CT, 100V/2*10A (schottky) ? TO-220AB D0 : SFA1606G, 400V/16A, TO-220AB For further understanding of the contents of the present invention, the experimental waveforms of the following embodiments, the voltage of the circuit components and For the code of the current, please refer to the equivalent circuit of Figure 4(a). 7 and FIG. 8 show an embodiment of the linear piezoelectric ceramic motor driving circuit of the present invention. In FIG. 7(a), the voltage Vasi and the current//^ waveform of the low voltage switch Q are turned on, and the low voltage switch Q is turned on as shown in FIG. It has the characteristic of zero current switching (ZCS) 20 200812213. When the low voltage switch β is cut off, the surge voltage at both ends is controlled by the first clamp diode 至 to the clamp capacitor q, and the clamping voltage is around 30V, which is consistent with Theoretical analysis, and far below the maximum withstand voltage of the switch 100V. The on-load duty cycle of the low-voltage switch is 0.59, and there is still considerable room for adjustment to improve input voltage variation, load effect, and output voltage. Figure 7(b) shows the voltage v@+ and current waveform of the full-bridge inverter switch 仏+. The full-bridge switch 仏+ has zero-voltage switching (ZVS) characteristics. It can be seen from Fig. 7(a) and Fig. 7(b) that the switching loss is reduced, which is quite helpful for the conversion of efficiency. Fig. 7(c) shows the correlation between the current of the primary side winding A, the current of the secondary side winding puncture/12 and the low voltage switching voltage, and the current L of the primary side winding A and the current of the secondary side winding Z2/Ζ2 are shown by the figure. The ratio is 6:1, which is equal to the turns ratio designed by the present invention, and the current on the high voltage side is much smaller than the low side current, indicating that the present invention has completely achieved the purpose of dividing the voltage and current on the high and low voltage sides, and further proves the theory. Relevance to reality. Figure 7 (d) is the voltage of the high voltage circuit ^, the first clamp diode voltage vD1 and the second clamp diode voltage vD2 waveform, the voltage of the second clamp diode voltage is lower than the voltage of the high voltage circuit, and Referring to the waveform of Fig. 8(a), the second clamped diode is 2% of the high voltage diode, and the two diodes are clamped to each other, and the waveform is enlarged as shown in Fig. 8(b). 8(e) and (f) are waveforms of the voltage vD2 current of the second clamp diode and the voltage current k of the high voltage diode, and the reverse recovery current is lower than the on current and the surge circuit is not added. Underneath, there is no surge voltage at both ends of the diode, so the diode has achieved voltage clamping and flexible switching effects. Fig. 8(c) shows the waveform of the AC voltage of the parallel resonant tank of the resonant inverter, the low voltage of 21,122,122, and the voltage of the full-bridge switching voltage, and the full-bridge switching mode when the low-voltage switch α completes the one-cycle switching mode. A+ is only half completed, so after the end of the two cycles of the low voltage switch β, the full bridge switch begins the next cycle. Figure 8(d) shows the waveform of the output voltage of the voltage 匕 of the high-voltage circuit and the parallel resonant tank of the resonant inverter. The ratio of the peak value of the AC voltage to the voltage of the high-voltage circuit is about 1.376 times larger than the equation (15). 1.273 times in ). Fig. 8(e) and Fig. 8(f) show the output AC voltage % of the resonant regenerator applied to the 10W load and the unloaded parallel resonant tank, and the Fourier analysis of the waveform's total harmonic distortion rate (THD). Figure 8(e) shows the total harmonic distortion (THD) of the output AC voltage waveform at 9% for a 10W load. Figure 9(f) shows that the total harmonic distortion rate (THD) is slightly higher at 12.9% when there is no load. 9 is a diagram showing the measured waveform of the output voltage of the parallel resonant tank of the resonant inverter when the linear piezoelectric ceramic motor driving circuit of the single-stage structure disclosed in the present invention is applied to the linear piezoelectric ceramic motor without load, wherein (a) (b) and (c) output 40kHz sinusoidal AC voltage waveforms for command voltages +3, +6, and +9 volts, respectively. The corresponding rate and voltage peaks are I6mm/-166V, 52mn/-208V, and 49mn, respectively. / — 260V ; (d), /sec /sec /sec v ' (e) and (f) output a 40kHz sinusoidal AC voltage waveform for command voltages of -3, -6, and -9 volts, respectively, corresponding to rate and voltage The peak values are

Mmry __164v, 49mn/ --206V and 86mn/ --258V. Measuring /sec /sec /sec Piezoelectric ceramic motors have a positive and negative static capacitance of 1.83nf and 1.93nf at rest, due to the difference between the forward static capacitance and the reverse static capacitance, 22 200812213 caused when the command voltage value is the same , the difference between the forward and reverse speeds and the voltage peak, which is the nonlinear characteristic of the internal capacitance of the piezoelectric material, forming the LLCC as the vibration curve offset 'but the same direction is not easily affected by the load change; ^ The characteristics still exist. Fig. 10 is a diagram showing the output of an alternating current voltage V of a parallel resonant tank of a spectral converter when the linear piezoelectric ceramic motor drive circuit of the single-stage architecture disclosed in the present invention is applied to a linear piezoelectric ceramic motor blocking test. The measured waveform, where (a), (1)), and ((:) are command voltages +3, +6, and +9 volts, respectively, output 4〇]^1^ sinusoidal AC voltage waveform; (d), ( e) and (f) output 40kHz sinusoidal AC voltage waveforms for command voltages _3, _6 and -9 volts respectively. It can be clearly seen from Fig. 9 and Fig. 10 that under a fixed command voltage, When the port is in the no-load or blocking test, the sinusoidal voltage waveform outputted by the resonant inverter is almost unchanged, thereby verifying that the linear piezoelectric ceramic motor drive device disclosed in the present invention has excellent stability. The present invention has been disclosed in the foregoing preferred embodiments, and is not intended to limit the scope of the invention, and the invention may be variously modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application. Remarks: Reference 1 R. J. Wai, R. Y. Duan, J. D. Lee, and C. H. Tu, “Development of high -gain six-order resonant technique for linear piezoelectric ceramic motor drived Pen Ding R, OC Invention Patent, Appl NO. 091137812. 2 F· J. Lin, and L. C· Kuo, ''Driving circuit for ultrasonic motor servo 23 200812213 drive with variable-structure adaptive model-following control, ff IEE Proceeding Electrical Power Applications, vol. 144, no. 2, pp. 199-206, 1997. 3 F· J. Lin, RY Duan, and J. C· Yu, “An ultrasonic motor drive using a current-source parallel-resonant Inverter with energy feedback," IEEE Trans. Power Electron., vol. 14? no. 1, pp. 31-42, 1999. 4 FJ Lin, RY Duan, RJ Wai and CM Hong, "LLCC resonant inverter for piezoelectric ultrasonic motor Drive," /五五/Voc. η — ··___ A____7 ___1 Λ Λ r ___ c λ ^rn λ n^7 1 rvr^rv vui· ιπ·υ, iiu. pp. 丄5 RJ Wai, FJ Lin, R. Υ·Duan, Κ·Y. Hsieh, and JD Lee, “Robust fuzzy neural network control for linear ceramic motor drive via backstepping design technique^ IEEE Trans. Fuzzy Systems, vol. 10, no.l5 pp. 102-H2 , 2002. 6 RJ Wai, R. Y· Duan, and J. D. Lee, Hybrid resonant driving circuit for linear piezoelectric ceramic motor via energy feedback technique, ROC Invention Patent l>\o. 197634. 7 R· J· Wai and R. Y· Duan, “High-efficiency DC/DC converter with high voltage gain/5 IEE Proc. Electric Power Applications, vol. 152? no· 4, pp· 793-802, 2005.

8 Q. Zhao and F· C. Lee, “High-efficiency, high step_up DC-DC converters/5Trans. Power Electron., vol. 18, no. 1? pp. 65 73, 2003. [Simple description] 24 200812213 Fig. 1 The mechanical structure of the linear dust-fired ceramic motor. Figure 2 is a schematic diagram of the linear dust-electric ceramic circuit structure of the single-stage architecture of the present invention. The electric circuit of the drive circuit of the present invention is the power generation of the single-stage structure of the present invention. The timing diagram of the circuit, the electric circuit of the drive circuit of the present invention, the linear piezoelectric ceramic of the single-stage structure of the present invention is used as a pattern diagram of the single-stage structure of the present invention. The terrarium, (4) under different resistance ratio conditions, the electric core also humiliates the duty cycle of the circuit and the relationship curve; _ number of hearts c open switch electric ink V as with the switch of the low switch duty cycle 4 β, 守, low voltage Figure 6 The linear type of the single-stage architecture of the invention = each. Spectrum «Road: At different loads, the voltage gain is up to = the high-order of the circuit is back to the linear piezoelectric test waveform of the early stage structure of the 7th electric I. 仏动弘路之图 Figure 8 is a single-stage architecture of the invention of the linear piezoelectric ceramic motor drive · Measure the second waveform. Ά Figure 9. The linear piezoelectric ceramic motor drive circuit of the single-stage architecture of the present invention, the load-free measured waveform of the output AC voltage of the parallel oscillating vibration tank. # Figure 1 (The linear pressure of the single-stage architecture of the present invention) Electric ceramic motor drive circuit, parallel spectrum oscillator output AC voltage blocking test measured waveform. 25 200812213 [Main component symbol description] 101: DC input circuit 102: - secondary circuit 103: secondary circuit 104: clamp circuit 105 : High voltage circuit 106 : Control drive circuit 10 7 · South-order spectral circuit 108 : Full-bridge inverter circuit ~: DC input circuit voltage VH : High-voltage circuit voltage ν,: Output AC voltage β : Low-voltage power semiconductor switch (referred to as low voltage Switch), 仏-, & + and: high-voltage power semiconductor switch (referred to as full-bridge switch) 7;: transformer with high excitation current (referred to as coupled inductor) A:: shank inductance K of the vehicle combination coefficient A: coupled inductor Primary winding (referred to as primary winding): coupled inductor secondary winding (referred to as secondary winding) 4: series resonant inductor 4: parallel resonant inductor ς: clamp capacitor c2: medium voltage Yung C #: high-voltage capacitor 26 200812213 q: series resonant capacitor CV: parallel resonant capacitor A: a first clamping diode is the 2: Where the second clamp diodes: two high-voltage diodes 27

Claims (1)

200812213 X. Patent application scope: 1. A single-stage linear piezoelectric ceramic motor drive circuit comprises a primary side circuit consisting of a coupled inductor primary winding and a low voltage switch, the main purpose of which is to conduct current of the primary winding. And the low-voltage switch is turned on and off, storing or releasing the energy of the primary winding of the coupled inductor; a clamping circuit: consisting of the first clamped diode, the second clamped diode and the clamped capacitor, mainly absorbing the coupled inductor primary side Leakage energy to protect the low-voltage switch and release the absorbed energy to the output; a secondary circuit: consisting of a secondary winding of the coupled inductor, which is composed of a medium-voltage capacitor, which uses the low-voltage switch to conduct and cut off respectively. Boost; a high voltage circuit consisting of a high voltage diode and a high voltage capacitor to provide the high voltage DC power required by the downstream inverter; a full bridge inverter circuit: consisting of four high voltage power semiconductor switches, responsible for The DC voltage of the high voltage circuit is switched to the AC square wave voltage required for the high-order resonant inverter; a high-order resonant circuit It consists of four passive components, such as series resonant inductor, parallel resonant inductor, series resonant capacitor, and parallel resonant capacitor. The high-voltage square wave waveform is filtered into a sine wave by high-order resonance principle. One control drive circuit··speed control The command is converted into a driving signal required for the low-voltage switch and the four full-bridge switches; when the low-voltage switch and the full-bridge switch are turned on, the low-voltage switch provides a path of the coupled current and the induced current of the primary winding of the coupled inductor, and the coupled coupled inductor secondary side The winding current passes through the series medium-voltage capacitor and the high-voltage diode and the two full-bridge switching paths, giving the resonant half-cycle the required power supply for the positive half-cycle; when the low-voltage switch is turned off, the two full-bridge switches remain continuously conducting, clamping 28 200812213 The circuit absorbs the leakage inductance energy of the primary side winding of the coupled inductor, and fixes the low voltage to protect the low voltage switch. When the leakage inductance energy is reduced, the coupled inductor will be excited to the secondary winding of the light coupling inductor, so the winding releases the energy to the medium voltage. Capacitor; when the low-voltage switch is turned on again, the full-bridge switch is commutated to become the two full-bridge switches. It is also the beginning of a cycle, and reflux the other AC voltage to become half weeks; thus full-bridge switch; rate of one-half of the low pressure switch, all share a control switch may cry. A linear piezoelectric ceramic of a single-stage structure as described in claim 1 of the patent application.兖,达驱动罨's surface of the primary side of the coupled inductor is r, a high air gap of high excitation current = ri:, using the k pressure state turns ratio is different, the voltage and current of the mouth The low-voltage side of the inductor primary side circuit has a small current, high I = 2: the linear piezoelectric ceramics of the single-stage architecture described in the first item, and the other The line inductance can be the salt-gull-coupled inductor-the leakage inductance energy of the secondary winding; the coupling: the voltage should be ί, then the higher the leakage inductance will reduce the secondary winding day of the coupled inductor; the second circuit will increase the low-voltage semiconductor The switch conductance can still maintain the output voltage setting. Both ends of the body = the first-box two-pole withstand voltage used in the upper circuit. The low-threshold rate semiconductor switch is the same as the clamped capacitor 'required missing diode switch'. Therefore, low (four) low conduction loss can be used. The single-stage architecture of the single-stage architecture described in the first paragraph of the patent range 29 motor drive circuit, in which the two ends of the body are respectively connected to the clamped electric two:: the second clamped second pole voltage is higher than the high ink capacitor With the pole body, when the diode is forced to contain the cranial dry voltage and the clamp capacitor voltage Z k makes the (10) circuit high: the difference U of the pole U, will be lower than the high voltage capacitor voltage two: therefore Need to withstand electricity 6 · Single-stage road as described in item i of the patent scope. When the voltage is higher than the high voltage and the high voltage diode is used, the voltage of the base voltage is turned on, and the second clamp diode used by the household is added. The slow factory is lower than the high-factory capacitor power plant, and there is no need to install two clamps: the second gate used by the diode and the clamp circuit is 1V, so there is no diode reverse recovery current.砀 砀 同时 利 利 利 利 利 利 利 利 利 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围 范围交流 kHz AC sinusoidal voltage; design geometric frequency 盥 switching frequency is the same 4 〇 k Η z, making the full bridge switch flexible switching effect when turned on, reducing the switching loss advantage. 8 · As claimed in the first item The linear piezoelectric ceramic motor driving circuit of the single-stage architecture, wherein the control driving circuit reduces the 80 kHZ square wave driving signal to 40 kHz and separates into four groups of 〇 and 180. The two square wave waveforms provide high-order resonance 4 high voltage power required by the flow device The closed-circuit drive signal of the semiconductor switch. 30