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 |
| Weight | 300 grams |
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
