4. モータ・ドライバICのアプリケーション回路シミュレーション Device Feature: • Input logic to drive Bipolar Step Motor • Internal OSC • Current Level Set • Mixed Decay Control • Charge Pump Unit • H-Bridge Output • Protection Unit All Rights Reserved copyright (C) Bee Technologies Inc. 2008
5. モータ・ドライバICのアプリケーション回路シミュレーション Model is include: Input logic to drive Bipolar Step Motor Internal OSC Current Level Set Mixed Decay Control Charge Pump Unit H-Bridge Output Protection Unit (Over Current Protection Behavioral Logic Model All Rights Reserved copyright (C) Bee Technologies Inc. 2008
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7. MOSFET Shoot-through CurrentAll Rights Reserved copyright (C) Bee Technologies Inc. 2008
8. モータ・ドライバICのアプリケーション回路シミュレーション MIXED DECAY MODE Waveform (current waveform) Datasheet Diagram Simulation Result All Rights Reserved copyright (C) Bee Technologies Inc. 2008
9. モータ・ドライバICのアプリケーション回路シミュレーション Phase Input vs. Phase Output Current ( 250Hz Phase Frequency ) Current Ripple Input Control Signal Phase (A) Input Control Signal Phase (B) Motor Phase Current All Rights Reserved copyright (C) Bee Technologies Inc. 2008
10. モータ・ドライバICのアプリケーション回路シミュレーション MIXED DECAY MODE Current Waveform Motor Phase Current (Ripple) Output V(A Output V(A) All Rights Reserved copyright (C) Bee Technologies Inc. 2008
12. モータ・ドライバICのアプリケーション回路シミュレーション Half Step Control Signal Simulation Result Simulation Explore Rate of Current Change All Rights Reserved copyright (C) Bee Technologies Inc. 2008
13. モータ・ドライバICのアプリケーション回路シミュレーション Phase Inductnace (Ls) vs. Frequency (ステッピング・モーター) Phase Inductance (Ls) is selected at phase frequency 100kHz Ls = 2.315mH All Rights Reserved copyright (C) Bee Technologies Inc. 2008
14. モータ・ドライバICのアプリケーション回路シミュレーション Phase Inductor model (100k-1MHz) Agilent 4294A Motor coil is modeled from an inductor series with resistor. Model parameters are extracted to fit characteristics around chopping frequency (100kHz).Ls=2.315mH, Rs=8.7ohm All Rights Reserved copyright (C) Bee Technologies Inc. 2008
15. モータ・ドライバICのアプリケーション回路シミュレーション Measured result: Mixed Decay Mode ripple current Measured result show the ripple current Snap Current Motor Phase Current Ripple Current Magnitude Output V(A Output V(A) All Rights Reserved copyright (C) Bee Technologies Inc. 2008
16. モータ・ドライバICのアプリケーション回路シミュレーション Simulated result: (the chopping frequency is approximately 100kHz) The result show how model simulate Ripple Current Magnitude at fchop is approximately 100kHz. Motor Phase Current: V(X_U1.IOUT_A1) Snap Current Ripple Current Magnitude Output V(A: V(U1:OUT_A1) Output V(A): V(U1:OUT_A) All Rights Reserved copyright (C) Bee Technologies Inc. 2008
