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RPM measurement for DC engines via the power supply, The RPM-8000-DC was special developed for DC engine RPM measurements. This field of engineering becomes more important in the future regarding the low noise design of compact drives, e.g. in the automotive industry for electrical window opener, slide roofs and seat adjustments. The RPM-8000-DC will used on machines, where the drive shaft is not accessible or where conventional sensor mounting is to time and money expensive. The device will simply connected in series with the engine power supply, without any influence to it. Every transition between two successive collector lamellas generates a small fluctuation of the engine current. This variations will detect, cleaned from interfering pulses and noise, amplified and converted to a TTL compatible frequency signal, which is per design proportional to the engine RPM. Simultaneously a potentiometer adjustable linear analog output signal will generated.
The sensor electronics will supplied from a separate voltage input in the range from 12 to 15V DC.
RPM-8000 DC
RPM measurement for DC engines via the power supply
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RPM 8000 DC - Font
RPM 8000 - Rear |
Short description
The RPM-8000-DC
was special developed for DC engine RPM measurements. This field of
engineering becomes more important in the future regarding the low noise
design of compact drives, e.g. in the automotive industry for electrical
window opener, slide roofs and seat adjustments. The RPM-8000-DC will used
on machines, where the drive shaft is not accessible or where conventional
sensor mounting is to time and money expensive. The device will simply
connected in series with the engine power supply, without any influence to
it.
Every transition between two successive collector
lamellas generates a small fluctuation of the engine current. This
variations will detect, cleaned from interfering pulses and noise, amplified
and converted to a TTL compatible frequency signal, which is per design
proportional to the engine RPM. Simultaneously a potentiometer adjustable
linear analog output signal will generated.
The sensor electronics will supplied from a separate
voltage input in the range from
12 to 15V DC.
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Specifications for supported DC engines
Supply voltage range: 0 – 48V
Load current range: 0 - 10A or 0-80A
Digital frequency output
Frequency range: 5Hz – 10kHz
Pulse duty ratio: 0.4 – 0.6
Remaining jitter:
»
0.25ms
Logic level: TTL
Signal relations: Output frequency [Hz] =
No. of collector lamellas
*
Engine RPM [min-1]
/ 60
Analog voltage output
Voltage range: 0 - 10V
Pot.
adjustment range: 0 - 1V per 1000Hz
Output impedance: 2W,
10mA max.
Output ripple:
»
1% of voltage value
(for 500Hz input
frequency) |
Sensor power supply
Input voltage: 12 - 15V
Supply current:
»
65mA
Physical quantities
Dimensions: 105 x 105 x 65mm
(without
connectors)
Weight: 930g
Environment conditions
Operating temperature range: 0 - 70°C
Storage temperature range: -20 - 70 °C
Humidity: 20 - 80%
non-condensing
Vibration: 5g Mil Standard 810C,
curve C
Shock: 10g in all directions |
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