DC link stabilized field oriented control of electric propulsion systems

Sudhoff, Scott D.; Corzine, Keith; Glover, Steven F.; Hegner, H.J.; Robey, H.N.

doi:10.1109/60.658200

Cited by 185 publications

(106 citation statements)

References 4 publications

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“…This expression has been used to predict stability in [4]- [6], [8], and [9]. For a drive with data according to the Appendix, the stability condition (3) is only satisfied for powers less than 7% of the nominal power.…”

Section: Stabilization With Perfect Controlmentioning

confidence: 99%

“…This means that a decrease in dc-link voltage should result also in a decrease of dc-link current and not an increase, as with the constant power operation. To obtain this, the following modification of the torque reference is suggested to stabilize the drive in [7] and [8] (actually, braking is not considered in [8]):…”

Section: Stabilization With Perfect Controlmentioning

confidence: 99%

“…is assumed to be constant (see, e.g., [4]- [6] and [8]- [12]). This assumption means that the expression for the power can be linearized to give…”

Section: Stabilization With Perfect Controlmentioning

confidence: 99%

“…This means that the power flow of the drive is adapted to variations in the dc-link voltage (i.e., modified disturbance rejection). In [7] and [8], an explicit stabilization scheme is presented, which in [9] is called the nonlinear system stabilizing controller (NSSC). Under the oftenused assumption of perfect torque control (disturbance rejection as well as reference tracking), it can be shown that the NSSC stabilizes the drive at all operating points.…”

mentioning

confidence: 99%

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Stabilization of Induction Motor Drives With Poorly Damped Input Filters

Mosskull

Galic

Wahlberg

2007

IEEE Trans. Ind. Electron.

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Abstract-Efficient torque control of induction motor drives in combination with resonant dc-link input filters can lead to a type of stability problem that is known as negative impedance instability. An often-proposed solution to this problem is the nonlinear system stabilizing controller (NSSC). Stability is usually analyzed under the simplifying assumption of perfect torque control. This indicates that the NSSC stabilizes the drive at any operating point. In this paper, however, we show power laboratory experiments where the NSSC stabilization fails. An improved framework for stability analysis and synthesis of stabilization, based on a linear feedback model of the drive, is therefore proposed. With this approach, effects of time delays can easily be included, and stability margins can be directly established from measurements. To solve the indicated problems with NSSC, a stabilization controller that considers the practical limitations of torque control is derived. In the design of the stabilization controller, the tradeoff between damping and acceptable torque control is also explicitly taken into account. The proposed stabilization scheme is implemented and evaluated on a hardware-in-the-loop simulator as well as in a power laboratory. The results show that the proposed method outperforms the NSSC method.

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Section: Stabilization With Perfect Controlmentioning

confidence: 99%

Section: Stabilization With Perfect Controlmentioning

confidence: 99%

“…is assumed to be constant (see, e.g., [4]- [6] and [8]- [12]). This assumption means that the expression for the power can be linearized to give…”

Section: Stabilization With Perfect Controlmentioning

confidence: 99%

mentioning

confidence: 99%

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Stabilization of Induction Motor Drives With Poorly Damped Input Filters

Mosskull

Galic

Wahlberg

2007

IEEE Trans. Ind. Electron.

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“…The average model and small-signal analysis can be used to derive the input impedance of the system [27]- [29]. With the use of Park transformation, the voltage, current, and electromechanical characteristic equations can be modeled in the rotating d-q domain, as shown as follows: (13) where V d and V q are equivalent voltages of the motor in the d-q domain; I d and I q are equivalent currents of the motor in the dq domain; R d , R q , L d , and L q are equivalent resistances and inductances of the motor in the d-q domain; P is the number of the pole pairs; ω is motor speed; Ψ is the rotor flux linkage; J is the motor inertia; and T e and T L are electromagnetic torque and load torque, respectively.…”

Section: Closed-loop Impedance Of the Inverter For Pmsm With Id=0 mentioning

confidence: 99%

Stability Analysis of FCHEV Energy System Using Frequency Decoupling Control Method

Dai¹,

Sun²,

Xie³

et al. 2017

Journal of Power Electronics

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Fuel cell (FC) is a promising power supply in electric vehicles (EV); however, it has poor dynamic performance and short service life. To address these shortcomings, a super capacitor (SC) is adopted as an auxiliary power supply. In this study, the frequency decoupling control method is used in electric vehicle energy system. High-frequency and low-frequency demand power is provided by SC and FC, respectively, which makes full use of two power supplies. Simultaneously, the energy system still has rapidity and reliability. The distributed power system (DPS) of EV requires DC-DC converters to achieve the desired voltage. The stability of cascaded converters must be assessed. Impedance-based methods are effective in the stability analysis of DPS. In this study, closed-loop impedances of interleaved half-bridge DC-DC converter and phase-shifted full-bridge DC-DC converter based on the frequency decoupling control method are derived. The closed-loop impedance of an inverter for permanent magnet synchronous motor based on space vector modulation control method is also derived. An improved Middlebrook criterion is used to assess and adjust the stability of the energy system. A theoretical analysis and simulation test are provided to demonstrate the feasibility of the energy management system and the control method.

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Electric Powertrains

2018

Automotive Power Transmission Systems

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DC link stabilized field oriented control of electric propulsion systems

Cited by 185 publications

References 4 publications

Stabilization of Induction Motor Drives With Poorly Damped Input Filters

Stabilization of Induction Motor Drives With Poorly Damped Input Filters

Stability Analysis of FCHEV Energy System Using Frequency Decoupling Control Method

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