Our versatile IO boards can support Star or Delta configurations as well as a wide range of voltages and frequencies. Why You Need UEI's Synchro/Resolver & VDT IOĮngineers use UEI hardware to test, measure and control synchro, resolver, and VDTs for their applications. Synchro/Resolvers allow you to monitor and control: Like all UEI IO Boards, the Synchro/Resolver IO Board offers operation in harsh environments and has been tested to last within: They can also be used in simulation applications to simulate the transducer. Each board can supply the excitation voltage and measure the output wave forms of the transducer. UEI manufactures a wide variety of analog and digital IO boards, including ones for Synchro/Resolvers, LVDTs, and RVDTs. What to know about common misconceptions of synchro signals? Click to read the blog post below. It is considered an analog device, and has digital counterparts such as the digital resolver, rotary (pulse) encoder. The name resolver comes from resolving an angular input in to its x and y components. Resolver: Type of rotary electrical transformer used for measuring degrees of rotation. The voltages are measured and used to determine the angle of the rotor relative to the stator. The primary winding of the transformer, fixed to the rotor, is excited by an alternating current causes voltages to appear between the Y-connected secondary windings fixed spatially at 120 degrees to each other on the stator. In its general physical construction, it is much like an electric motor. Synchros are often used for measuring the angle of a rotating machine or in case of selsyn (self-synchronous) configuration, used for controlling position of a device. Synchro: Transducer that uses a transformer whose primary-to-secondary coupling may be altered by changing the relative orientation of the two windings. © 1997 Scripta Technica, Inc.Synchro/Resolver Tutorial Guide QUICK LINKS Experimental results show a satisfactory speed response for four‐quadrant drive. In this system, the VR synchro is directly connected to the motor shaft, whose output voltages are demodulated and directly used as the current phase command for the inverter current supplied to the motor. In addition, a variable speed drive system for eight‐pole reluctance motors which uses the new control scheme is introduced. This paper describes the theory of the novel VR synchro and presents measured waveforms of the output voltages of a prototype VR four‐speed synchro. The authors have therefore developed a novel VR (variable reluctance) synchro without the rotary transformer. However, conventional brushless synchros are expensive and bulky due to the intricate construction, where a rotary transformer supplies current to the exciting winding on the rotor core. The authors have previously presented a control scheme for synchronous reluctance motors in which the motor current is controlled to keep the MMF (magnetomotive force) phase angle constant, and have shown that a simpler control scheme is possible by using an N‐speed synchro for a 2N pole motor. Shimomura, Shoji Ishizaki, Akira Saito, Kazutaka A novel variable‐reluctance N‐speed synchro and its application for synchronous reluctance motor drive A novel variable‐reluctance N‐speed synchro and its application for synchronous reluctance motor.