The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a robust and relatively concise flux-weakening control scheme using anti-windup for induction motor(IM) in high speed region. The proper q-axis current reference in constant-voltage region is achieved for both maximum torque capability and anti-windup phenomenon. Comparing with voltage regulator method, only one tuning parameter ensures the tuning simplification. First, the operation...
This paper presents a novel field-weakening strategy combined with a modified discrete speed-adaptive full-order observer to improve the performance of speed-sensorless induction machine drives in the field-weakening region. The robust field-weakening controller regulates the field current and the clamp of torque current according to the machine operating mode. Compared with the conventional inverse...
This paper proposes a novel seamless transfer method for microgrid connected fuel cell inverters (FCIs) between voltage source and current source modes. In order to protect the fuel cell, the FCI output power should be restricted when the microgrid frequency is greatly disturbed. In this sense, the FCI is transfered from voltage source mode to constant current source mode. Meanwhile, the FCI is transfered...
A novel scheme for obtaining the fundamental-frequency positive-sequence signals based on a combination of delayed signal cancellation (DSC) method and low-pass notch filter phased-lock loop (LPN-PLL) is proposed in this paper. DSC working in the stationary reference frame is used to obtain the fundamental-frequency positive-sequence voltage vector, while LPN-PLL is used to obtain pulsation and phase...
Designated verifier signature (DVS) is a cryptographic primitive, which allows a signer to convince a designated verifier of the validity of a signed statement and prevents the verifier from convincing any third party about the signature. As a variant of DVS, strong DVS (SDVS), which exhibits perfect non-transferability, does not accommodate secure disavow ability (or non-repudiation). It makes a...
To increase the voltage levels and reduce the harmonics feedback to the input source in high voltage high power application, this paper proposed one novel multilevel back to back AC-DC-AC converter. Firstly, the topology about this six level converter is introduced, which realize the neutral clamped points only by switches, and is attractive for its economy. The relationship between the multilevel...
A novel stator voltage oriented V/F control method for induction motor is presented in this paper to improve the low speed performance and stability of open-loop system. The control scheme adopts a novel stator resistor voltage drop compensation method to ensure the rated stator flux constant over a wide range of operating speeds. And through deeply research of the instability under light load condition,...
A novel V/F induction motor control system based on stator voltage oriented method is presented. This scheme includes dead time compensation, stator voltage compensation and anti-oscillation regulation, which can greatly improve the V/F systempsilas performance especially low frequency load capability and fast response capability. Different from conventional V/F methods, all the compensation and regulation...
The V/F controlled induction motor driver systems always suffer from middle frequency oscillations under light load conditions. Many methods were sponsored but always complex and parameters dependent. This paper present one simple and reliable method which can improve the systemspsila stability: First, one efficient dead-time compensating method was present, which can reduce the distortion of phase...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.