User Manual

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Edition March 2014

maxon EC motor EC 20 flat with integrated electronics

Document ID: 903155en

Operating Manual

maxon motor ag Brünigstrasse 220 P.O.Box 263 CH-6072 Sachseln Phone +41 41 666 15 00 Fax +41 41 666 16 50 www.maxonmotor.com

The EC 20 flat with integrated electronics is a brushless, speed-controlled

1-quadrant drive. It is available as 2 watt or 5 watt version and in 2-wire or

5-wire variants as follows:

Functions

• Commutation with Hall sensors

• Digital speed control

• Speed range: 200…7’000 rpm (depending on variant)

• Current limitation, non-adjustable

• Overvoltage and undervoltage switch-off

• Overvoltage protection

• Blockage protection, temperature monitoring

• Inverse polarity protection

2-wire variant

• Speed proportional to supply voltage

5-wire variant

• Set value speed through analog signal 0…10 V

• 2-wire operation possible

• Versions:

– «Enable» TTL level-compatible

– Direction preselection «CW/CCW» TTL level-compatible

• Speed monitor delivers speed-proportional frequency signal

Contents

READ THIS FIRST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

3 Minimal Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

4 Functional Description of 2-Wire Variant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

5 Functional description of 5-Wire Variant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

6 Protective Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

7 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Order number

Variant

Nominal

speed

[rpm]

Output

[W]

IP 40 IP 00

350795 350776 2-wire 3000 2

350796 350778 2-wire 6000 2

350794 349694 5-wire «Enable» 6000 2

370413 370412 5-wire «CW/CCW» 6000 2

350834 350804 2-wire 3000 5

350835 350805 2-wire 6000 5

350806 349731 5-wire «Enable» 6000 5

370416 370415 5-wire «CW/CCW» 6000 5

Summary of content (20 pages)

PAGE 1
maxon EC motor EC 20 flat with integrated electronics Document ID: 903155en Operating Manual Edition March 2014 The EC 20 flat with integrated electronics is a brushless, speed-controlled 1-quadrant drive.
PAGE 2
READ THIS FIRST These instructions are intended for qualified technical personnel. Prior commencing with any activities… • you must carefully read and understand this manual and • you must follow the instructions given therein. The EC 20 flat with integrated electronics is considered as partly completed machinery according to EU Directive 2006/ 42/EC, Article 2, Clause (g) and is intended to be incorporated into or assembled with other machinery or other partly completed machinery or equipment.
PAGE 3
Terms used 1-Q speed controller The motor produces positive torque in the selected or programmed direction. The load is not actively decelerated when the speed set value is reduced or the direction changed (direction preselection version). Speed control recommences as soon as the load has reduced its speed by friction to the level specified by the set value speed. Max. torque Mmax [mNm] The maximum torque the motor can produce for a short term. It is limited by the overload protection of the electronics.
PAGE 4
Operating range n = f (M) Nominal speed 6000 rpm Figure 2 2-Wire Variant (350778) (350796) Operating range n = f (M) Torque and speed depend on operating voltage Figure 3 5-Wire Variant (349694) (350794) (370412) (370413) Motor Data 5 Watt at 24 VDC IP 40 (with housing) IP 00 (without housing) 350834 350804 350835 350805 350806 / 370416 349731 / 370415 24 24 24 6000 Nominal voltage VDC No load speed rpm 3000 6000 No load current mA 18.8 23.1 23.
PAGE 5
Operating range n = f (M) Nominal speed 6000 rpm Figure 5 2-Wire Variant (350805) (350835) Operating range n = f (M) Torque and speed depend on operating voltage Figure 6 5-Wire Variant (349731) (350806) (370415) (370416) Controller Data Variant Nominal speed 2-wire 3000 rpm 2-wire 6000 rpm 5-wire 6000 rpm Control variable Speed Speed Speed Supply voltage VCC V 10…28 10…28 10…28 Input set value speed V =VCC =VCC 0.33…10.8 Scaling set value speed rpm/V Speed range rpm Max.
PAGE 6
Mechanical Data (preloaded ball bearings) Version Rotor inertia 2 Watt 5 Watt 3.2 5.1 0 0.14 0 0.14 gcm2 <2 N >2 N mm preloaded preloaded Max. axial load dynamic N 1.8 1.8 Max. axial load static supported *a N 20 200 20 200 Axial play at axial load Radial play Max.
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Dimensional Drawings IP 40 Figure 7 2 Watt Version – Dimensional Drawing [mm] IP 40 Figure 8 maxon EC motor EC 20 flat IE Operating Manual IP 00 IP 00 5 Watt Version – Dimensional Drawing [mm] Document ID:: 903155en Edition: March 2014 © 2014 maxon motor. Subject to change without prior notice.
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2 Installation Electrostatic Sensitive Device (ESD) • Make sure to wear working cloth in compliance with ESD. • Handle device with extra care. Possible irreversible Damage of Motor • Until completion of the installation, individual components can be permanently damaged by improper handling. Therefore, handle the components with particular care. • Max. torque of flange screws is 0.3 Nm (grade 8.8 screws). • Improved cooling through mounting a large metallic part. • Cable outlet preferably downwards.
PAGE 9
3 Minimal Wiring 2-Wire Variant Figure 9 2-Wire Variant with external Power Source 5-Wire Variant maxon EC motor EC 20 flat IE Operating Manual Figure 10 5-Wire Variant: Speed Set Value and Release «Enable» or Direction «CW/CCW» (depending on Version) with external Power Source Figure 11 5-Wire Variant: Speed Set Value with external Power Source and Release «Enable» or Direction «CW/CCW» (depending on Version) with Potential-free contact Document ID:: 903155en Edition: March 2014 © 2014 maxon moto
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Figure 12 5-Wire Variant: Speed Set Value with external Potentiometer and Release «Enable» or Direction «CW/CCW» (depending on Version) with external Power Source Figure 13 5-Wire Variant: Speed Set Value with external Potentiometer and Release «Enable» or Direction «CW/CCW» (depending on Version) with Potential-free Contact Document ID:: 903155en Edition: March 2014 © 2014 maxon motor. Subject to change without prior notice.
PAGE 11
5-Wire Variant in Operating Mode “2-Wire” The operating mode “2-Wire” can be simulated by shorting the connections of speed set value input and speed monitor output. Thereby, the speed proportional to the supply voltage (Figure 21). Figure 14 5-Wire in Operating Mode “2-Wire” With the variant Direction Preselection «CW/CCW», the grey wire is used to define direction of rotation.
PAGE 12
4 Functional Description of 2-Wire Variant Speed proportional to supply voltage VCC 12 • Motor speed is proportional to the supply voltage, independent of torque. • Supply voltage can be varied within the permitted range.
PAGE 13
5 Functional description of 5-Wire Variant Set value speed input Motor speed is set with an analog voltage at the input “Speed Set Value”. The input is protected against overvoltage. Pin assignment Connection wire white Input voltage range 0…+10.8 V (referenced to GND) Input impedance 62 kΩ (in range of 0…+21.9 V) 47 kΩ (in range of +21.
PAGE 14
Figure 19 5-Wire Variant: Speed as Function of Set Value Voltage Optionally, the controller can be set to 2-wire operation mode by linking (shorten) both connections speed monitor (green) and speed set value (white). Thereby, the connection must be established before applying the supply voltage. Working Principle of Detection of “2-Wire” Operating Mode with 5-Wire Motor After power on of the controller, the output “Speed Monitor” will be turned on after 270 ms, than turned off again after 40 ms.
PAGE 15
Figure 20 5-Wire Variant: Examples for possible PWM Level Control at Input “Speed Set Value” Enabling with Version «Enable» The power stage is activated with the digital input “Enable”. It is protected against overvoltage. Pin assignment Connection wire grey Input voltage range 0…+5.0 V (referenced to GND) Input impedance 112 kΩ (in range of 0…+5.9 V) 12 kΩ (in range of +5.
PAGE 16
Enabling and Direction Preselection with Version «CW/CCW» The power stage is activated if the voltage to the input “Speed Set Value” is above 0.17 V. Direction of rotation «CW/CCW» will be determined by digital input “Direction”. Pin assignment Connection wire grey Input voltage range 0…+5.0 V (referenced to GND) Input impedance 112 kΩ (in range of 0…+5.9 V) 12 kΩ (in range of +5.
PAGE 17
Figure 23 6 5-Wire Variant: Internal Circuitry of Output “Speed Monitor” Protective Functions Inverse polarity protection The supply voltage VCC is protected against polarity reversal. Thereby, the negative input voltage must not exceed the maximum permitted supply voltage VCC. Undervoltage switch-off The power stage is switched off when the supply voltage VCC drops below approx. 8.5 V to prevent operation beyond the specified range. If the supply voltage exceeds the restart threshold of approx.
PAGE 18
7 Troubleshooting 2-Wire Variant • Supply voltage between 10.0 and 28.0 VDC? • Supply voltage connected to red and black wires and switched on? • Voltage at red motor connection positive compared to black connection? • Power source not in current limiting? • Motor not blocked mechanically? 5-Wire Variant • Supply voltage between 10.0 and 28.
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••page intentionally left blank•• maxon EC motor EC 20 flat IE Operating Manual Document ID:: 903155en Edition: March 2014 © 2014 maxon motor. Subject to change without prior notice.
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© 2014 maxon motor. All rights reserved. The present document – including all parts thereof – is protected by copyright. Any use (including reproduction, translation, microfilming, and other means of electronic data processing) beyond the narrow restrictions of the copyright law without the prior approval of maxon motor ag, is not permitted and subject to prosecution under the applicable law. maxon motor ag Brünigstrasse 220 P.O.