Resolvers

Variable reluctance resolvers are widely used in motor feedback and position sensing applications. They are especially suitable for systems that require stable operation under demanding conditions, including vibration, temperature variation, and electrical interference. Compared with some other position feedback devices, variable reluctance resolvers are often selected for applications where durability and long-term reliability are more important.

A range of sizes and pole pair configurations can be matched to different installation spaces and system requirements. In addition to standard specifications, certain electrical and structural parameters can also be evaluated according to the application. This makes variable reluctance resolvers suitable for use in servo motors, industrial drive systems, aerospace equipment, and other motion control applications where reliable feedback performance is required.

The following specifications show the common size ranges and electrical parameters of variable reluctance resolvers. These data can be used as a basic reference during the early stage of selection. In actual applications, the final configuration is usually determined according to installation space, pole pair requirements, excitation conditions, accuracy expectations, and operating environment.

Resolver selection can vary from one motor system to another. In addition to basic dimensions, factors such as pole pair configuration, excitation conditions, transformation ratio, electrical accuracy, and operating temperature range may also need to be considered during selection. These parameters can affect how the resolver fits the available space and matches the performance requirements of the overall system.

In some applications, mounting structure and other integration-related conditions also need to be taken into account. For this reason, resolver selection is often based not only on standard specifications, but also on the actual working conditions of the project. A clearer understanding of the application can help define a more suitable resolver configuration at an early stage.

Resolvers and encoders are both used for position feedback, but they differ in output type, environmental suitability, and system priorities. In applications exposed to vibration, shock, temperature variation, moisture, dust, or electrical noise, resolvers are often preferred for their robust structure and stable performance. The comparison below outlines some general differences between the two.

SDM can support resolver projects based on application requirements and project conditions. In addition to standard specifications, communication can also start from dimensions, pole pair configuration, excitation conditions, electrical parameters, operating temperature range, and installation-related requirements. A clearer definition of these factors can help determine a more suitable resolver configuration at an early stage.

For projects that require further evaluation, customers can share target specifications, application requirements, drawings, or other available technical information for review. Earlier communication is often helpful in clarifying the feasible configuration, basic matching direction, and related project details before moving to the next stage. Contact us with your application requirements, target specifications, drawings, or other available technical information to discuss a suitable resolver solution.