RE7557 Brushless Resolver (Size 30)

M1000x750P_RE7557

RE7557

Size 30 Frameless Resolver (3″ or 75mm OD)

The Micronor RE7557 series frameless Brushless Resolver provides high performance in measurement and feedback applications where traditional resolvers fail – high speed, vibration, shock and radiation environments.  This resolver is designed for the most demanding harsh environment applications – including Aerospace, Space, Automotive, Marine, Submarine, Radiation, and Downhole.

The REXXXX series incorporate a proprietary solid rotor design with no windings. Hence, the resolver has only half the number of windings of a traditional brushless resolver, along with significantly increased reliability. The solid rotor allow operation with traditional oils or other liquids.

Specifications

Parameter Value
Type Control Transmitter (Rotor=Excitation Input, Stators=Sine/Cosine Output)
Size Size 30 (3″ or 75mm OD), 75mm OD x 57mm H
Bore 46mm ID
Max Speed Standard=25,000rpm
High Speed= 28,000rpm
Temperature Rating Standard= -40°C to +135°C
High Temperature= -70°C to +200°C
Accuracy +/- 60 arcmin
Excitation Frequency 1-10 kHz, 8 kHz typical
Transformation Ratio 0.5 (+/-10%)
Speed 1 (1 pole-pair)
Radial Air Gap 0.3mm (special gaps to 1mm available)
Shock Resistant 20 G
Vibration Resistant 10-50 Hz, 10 G over 0.5 hrs
Radiation Resistance Standard with High Temperature models

Ordering Information

Type Specifications Part Number
Standard Temperature, Standard Speed -40°C to +135°C, max 25’000rpm RE7557-1-1
Standard Temperature, High Speed -40°C to +135°C, max 28’000rpm RE7557-1-2
High Temperature, Standard Speed, Radiation Resistant -70°C to +200°C, max 25’000rpm
and Radiation Resistant
RE7557-2-1
High Temperature, High Speed, Radiation Resistant -70°C to +200°C, max 28’000rpm
and Radiation Resistant
RE7557-2-2

Features

  • Compact Size 30 (3″ or 75mm OD)
  • Standard bore, 46mm ID
  • Solid rotor design offers higher reliability than traditional wired resolvers
  • For harsh environment applications where traditional resolvers fail
  • Max Speed, 28,000 rpm
  • Max Temperature Range, -40°C to +200°C
  • High Temperature models are also Radiation Resistant
  • Excitation =1-10kHz, Transformation Ratio=0.5, Single Speed
  • Special Bore sizes and Higher Speeds available upon request 

Applications

  • Aerospace
  • Flight control systems
  • AC or DC servo motor feedback
  • Hydraulic pumps
  • Downhole
  • Automotive and race cars
  • High-speed spindles/li>
  • Nuclear environments (special Radiation Resistant models available)

Downloads

RE7557 Datasheet
RE7557 2D Drawing

TO ORDER

Call +1-805-389-6600 or email sales@micronor.com