Sun Li's research while affiliated with Harbin Institute of Technology and other places

Publications (14)

Conference Paper
To improve dynamic quality of PMSM speed servo system, a novel reaching law is proposed, different from the conventional reaching law, the system state is used to restrain the chattering and improve the reaching rate. The novel reaching law is applied to the PMSM speed servo system; a novel sliding mode speed controller is designed to replace the t...
Conference Paper
To improve dynamic quality of High-Speed PMSM control system, a novel design method for velocity and current loops was proposed. In the novel method, sliding mode variable structure and precision linearization strategies were applied to achieve decoupling control. Integrated speed and current sliding mode Controllers was designed. Simulation and ex...
Conference Paper
A new multilevel space vector PWM method based on phase-shift SPWM technique and conventional three-level space vector PWM technique is proposed for H-bridge cascaded inverters. The proposed approach is developed for H-bridge cascaded multilevel inverters used for induction motor control. Using this technique, the implementation of software and har...
Article
A systematic approach to the design of the conducted electromagnetic interference (EMI) filter of high-density plasma cutting power supply has been developed. Converter components have been accurately modeled, with parasitic elements extracted to reveal their impacts on the EMI noises. Circuit simulations have been used to analyze and minimize the...
Conference Paper
This paper proposed an advanced technology, which based on DSP and FPGA, applied in the fully digital and high-performance permanent magnet synchronous motor (PMSM) AC servo system. In the system, DSP unit implemented the position loop control by combining PI control and feedforward control, while FPGA unit implemented the speed loop and current lo...
Article
Electromagnetic interference (EMI) filter design aspect of high-density plasma cutting power supply is developed. Converter components are accurately modeled, with parasitic elements extracted to reveal their impacts on the EMI noises. Circuit simulations are used to analyze and minimize the EMI noises. Conducted EMI noise measurement and filter de...
Conference Paper
This paper employs a novel method, which is first decomposing the load rejection model and then deriving optimal combination models from the characteristics of the decaying speeds of the subtransient component and transient component of one phase voltage, to directly identify the transient parameters in different regions employing nonlinear least s...
Conference Paper
This paper proposed an advanced technology, which based on DSP and FPGA, applied in the fully digital and high-performance permanent magnet synchronous motor (PMSM) AC servo system. In this system, DSP unit implemented the position loop control by adopting the combination of PI control and feedforward control, while FPGA unit implemented the speed...
Article
EMI Filter Design and Performance for isolated full bridge buck converter is developed in this paper. In order to design a high performance EMI filter, many issues need to be considered beforehand. Some important issues including accurate model of converter components, parasitic elements, its effect on EMI noise and impedance mismatch are included...
Conference Paper
To suppress the conducted EMI of PWM adjustable speed system, the generation mechanism and coupling route have been analyzed in this paper. According the differential generation mechanism, coupling route and source distribution of the interference, corresponding suppression measure were adopted from interference source and coupling route. The overs...
Article
A complete model of switch-mode plasma cutting power supply and its simulation are developed. The full bridge isolated pulse width modulation (PWM) buck converter in continuous conduction mode (CCM) for high watt plasma power supply is approached. Reduced ripple current and improved power factor are achieved in the plasma power supply. With a PID c...
Conference Paper
In this paper, a novel space-voltage vector pulse width modulation (SVPWM) is presented based on H-bridged driving circuit. By the method the problem that there is no zero space vector to meet frequency restraint condition in 2-phased SVPWM is solved. The control principle and the definition of parameters are introduced through the topology of powe...
Conference Paper
In this paper, the control strategy of the maximum torque/current method is presented after the mathematical model of the 2-phase hybrid stepping motor is analyzed. And a space-voltage vector pulse width modulation (SVPWM) method is put forward based on the 2-phase hybrid stepping motor driven by H-bridged circuit simultaneously. At last, experimen...
Conference Paper
The linear model and magnetic network model have been developed for the three-phase permanent magnet inductor synchronous motor (PMISM) with distinguishing structures. Deduced from the established magnet network model, self inductance and mutual inductance are functions of rotor position rather than constants. It indicates the salient pole effects...

Citations

... In order to comply with these international EMC regulations, an EMI filter is often necessary. Many technical papers concerning passive and active EMI filters have focused on eliminating high frequency leakage current as discussed in [1], [2], [3] shaft voltage and bearing current in [4], [5], [6], [7] motor terminal over voltage in [8] and EMI in [9], [10], [11]. ...
... However, the integral part of PI leads to the superposition of state errors caused by external disturbance and internal mathematical model parameter changes, which will cause integral saturation [4]. In the high-performance PMSM drive occasions, e.g., high speed and low speed/torque error requirements, the conventional PI control may be hard to trace the expected goals dynamically [5,6]. ...
... It will be very difficult to limit these disturbances rapidly if adopting linear control methods like PI control algorithm [20]. Therefore, many nonlinear control methods have been adopted to improve the control performances in systems with different disturbances and uncertainties, e.g., robust control [4], [5], sliding-mode control (SMC) [6], [7], [10], [16], adaptive control [8], backstepping control [9], predictive control [11], intelligent control [13], [14], and so on. In these nonlinear control methods, where ud and uq represent d and q axes stator voltages, respectively id and iq are d and q axes currents, respectively; L is stator inductance; r is stator resistance; ...
... In order to comply with these international EMC regulations, an EMI filter is often necessary. Many technical papers concerning passive and active EMI filters have focused on eliminating high frequency leakage current as discussed in [1], [2], [3] shaft voltage and bearing current in [4], [5], [6], [7] motor terminal over voltage in [8] and EMI in [9], [10], [11]. ...
... Gradient-based methods are known as efficient techniques to solve nonlinear least squares problems, and therefore are attractive for our particular application. Although parameter identification has only recently been applied to the BDFM equivalent circuit, it has been widely adopted in a wide range of AC machines [83][84][85][86][87][88]. The gradient-based algorithms have been used in some applications, for example in [84,85,87,88]. ...
... All the latter result in low efficiency (Derammelaere et al., 2014). The open-loop operation is also characterized by a high torque ripple (Shukang and Erliang, 2003). For these reasons, the basic open-loop algorithms are unsatisfactory to drive a stepping motor in more demanding motion applications. ...
... The floater can be connected to the linear generator either via a non-flexible shaft or flexible robe. The design for a WEC using a non-flexible shaft is described in [14] and [15]. In this design the buoy and the generator are installed on the same shaft, and therefore they will have the same motion pattern. ...