Technical definitions

Обзор

Regulations, standards and specifications

The motors comply with the appropriate standards and regulations, see table below.

As a result of the fact that in many countries the national regulations have been completely harmonized with the international IEC 60034‑1 recommendation, there are no longer any differences with respect to coolant temperatures, temperature classes and temperature rise limits.

The motors listed below are UL-approved by Underwriters Laboratories Inc. and also comply with Canadian cUR standards:
SIMOTICS S‑1FK7/1FT7/SIMOTICS T‑1FW3/1FW6/SIMOTICS M‑1PH8 (without brake)/SIMOTICS L‑1FN3/1FN6.

Degrees of protection for AC motors

A suitable degree of protection must be selected to protect the machine against the following hazards depending on the relevant operating and environmental conditions:

• Ingress of water, dust and solid foreign objects
• Contact with or approach to rotating parts inside a motor
• Contact with or approach to live parts.

Degrees of protection of electric motors are specified by a code. This comprises 2 letters, 2 digits and, if required, an additional letter.

IP (International Protection)
Code letter designating the degree of protection against contact and the ingress of solid foreign objects and water

0 to 6
1st digit designating the degree of touch protection and protection against ingress of solid foreign objects

0 to 8
2nd digit designating the degree of protection against ingress of water (no oil protection)

W, S and M
Additional code letters for special degrees of protection

¹⁾ DIN VDE 0530 Part 5 or EN 60034 Part 5 specifies that there are only 5 degrees of protection for the first digit code and 8 degrees of protection for the second digit code in relation to rotating electrical machinery. However, IP6 is included in DIN 40050 which generally applies to electrical equipment.

Recommended degrees of protection for AC motors

When cooling lubricants are used, protection against water alone is inadequate. The IP rating should only be considered here as a guideline. The motors may have to be protected by suitable covers. Attention must be paid to providing suitable sealing of the motor shaft for the selected degree of protection for the motor (for 1FT7: degree of protection IP67 and flange 0).

The table can serve as a decision aid for selecting the proper degree of protection for motors. A permanent covering of liquid on the flange must be avoided when the motor is mounted with the shaft extension facing upwards (IM V3, IM V19).

Radial eccentricity tolerance of shaft in relation to housing axis

(refers to cylindrical shaft extensions)

Concentricity and axial eccentricity tolerance of the flange surface to the shaft axis

(referred to the centering diameter of the mounting flange)

Vibration severity and vibration severity grade A according to IEC 60034‑14

The vibration severity is the RMS value of the vibration velocity (frequency range from 10 to 1000 Hz). The vibration severity is measured using electrical measuring instruments in compliance with DIN 45666.

The values indicated refer only to the motor. These values can increase as a result of the overall system vibrational behavior due to installation.

Vibration severity limit values for shaft heights 20 to 132

The speeds of 1800 rpm and 3600 rpm and the associated limit values are defined in accordance with IEC 60034-14. Speeds of 4500 rpm and 6000 rpm and the specified values are defined by the motor manufacturer.

The motors maintain vibration magnitude grade A up to rated speed.

Vibration severity limit values for shaft heights 160 to 355

Balancing according to DIN ISO 8821

In addition to the balance quality of the motor, the vibration quality of motors with mounted belt pulleys and coupling is essentially determined by the balance quality of the mounted component.

If the motor and mounted component are separately balanced before they are assembled, then the process used to balance the belt pulley or coupling must be adapted to the motor balancing type. The following different balancing methods are used on motors of types SIMOTICS M‑1PH8:

• Half-key balancing
• Full-key balancing
• Plain shaft extension

The letter H (half key) or F (full key) is printed on the shaft extension face to identify a half-key balanced or a full-key balanced SIMOTICS M‑1PH8 motor.

SIMOTICS S‑1FT7/1FK7 motors with fitted key are always half-key balanced.

In general, motors with a plain shaft are recommended for systems with the most stringent vibrational quality requirements. For full-key balanced motors, we recommend belt pulleys with two opposite keyways, but only one fitted key in the shaft extension.

Vibration stress, immitted vibration values

The following maximum permissible vibration stress limits at full functionality apply only to the SIMOTICS S‑1FT7/1FK7 permanent-magnet servomotors and SIMOTICA T‑1FW3 torque motors.

Vibration stress in accordance with DIN ISO 10816:

1 g at 20 Hz to 2 kHz

For all main motors of type SIMOTICS M‑1PH8, the following limits are valid for (immitted) vibration values introduced into the motor from outside:

For all torque motors of type SIMOTICS T‑1FW3, the following limits are valid for (immitted) vibration values introduced into the motor from outside:

Coolant temperature (ambient temperature) and installation altitude

Operation (unrestricted): -15 °C to +40 °C (5 °F to 104 °F)

The rated power (rated torque) is applicable to continuous duty (S1) in accordance with EN 60034-1 at rated frequency, a coolant temperature of 40 °C (104 °F) and an installation altitude of 1000 m (3281 ft) above sea level.

Apart from the SIMOTICS M‑1PH8 motors, all motors are in temperature class 155 (F) and utilized in accordance with temperature class 155 (F). The SIMOTICS M‑1PH8 motors are designed for temperature class 180 (H). For all other conditions, the factors given in the table below must be applied to determine the permissible output (torque).

The coolant temperature and installation altitude are rounded to 5 °C and 500 m (1640 ft) respectively.

Duty types S1 and S6 in accordance with EN 60034‑1

Rated torque

The torque supplied on the shaft is indicated in Nm (lb_f-ft) in the selection and ordering data.

M_rated = 9.55 × P_rated × 1000/n_rated

P_rated  Rated power in kW

n_rated  Rated speed in rpm

M_rated Rated torque in Nm

M_rated = P_rated × (5250/n_rated)

P_rated  Rated power in HP

n_rated  Rated speed in rpm

M_rated Rated torque in lb_f-ft

DURIGNIT IR 2000 insulation system

The DURIGNIT IR 2000 insulation system consists of high-quality enamel wires and insulating sheeting in conjunction with a solvent-free resin impregnation.

The insulating material system ensures that these motors will have a high mechanical and electrical stability, high service value and a long service life.

The insulation system protects the winding to a large degree against aggressive gases, vapors, dust, oil and increased air humidity. It can withstand the usual vibration stressing.

Characteristic curves

Torque characteristic of a synchronous motor operating on a converter with field weakening (example)

n_rated Rated speed

n_max Inv Maximum permissible electric speed limit

n_max mech Maximum permissible mechanical speed limit

M₀ Static torque

M_rated Rated torque at rated speed

M_{max Inv} Achievable maximum torque with recommended motor module

M_max Maximum permissible torque

Motor protection

The KTY84‑130 temperature sensor is used to measure the motor temperature for converter-fed motor operation.

This sensor is a semi-conductor that changes its resistance depending on temperature in accordance with a defined curve.

Siemens converters determine the motor temperature using the resistance of the temperature sensor.

Their parameters can be set for specific alarm and shutdown temperatures.

The SIMOTICS L‑1FN3/‑1FN6 and SIMOTICS T‑1FW6 motors are additionally equipped with PTC sensors (PTC elements). In these motor series, evaluation is performed using the SME120/SME125 Sensor Module External or TM120 Terminal Module (see SINAMICS S120 drive system).

The KTY84‑130 temperature sensor is embedded in the winding overhang of the motor like a PTC thermistor.

The sensor is evaluated in the SINAMICS S120 drive system as a standard function.

If the motors are operated on converters that do not feature a KTY84 evaluation circuit, the temperature can be measured with the external 3RS1040 temperature monitoring relay. For a detailed description, please see Catalog IC 10 or Siemens Industry Mall:

http://www.siemens.com/industrymall

Paint finish

Motors without a paint finish have an impregnated resin coating. Motors with primer have corrosion protection.

All motors can be painted over with commercially available paints. Up to 2 additional paint coats are permissible.

Built-in encoder systems without DRIVE‑CLiQ interface

For motors without an integrated DRIVE‑CLiQ interface, the analog encoder signal in the drive system is converted to a digital signal. For these motors as well as external encoders, the encoder signals must be connected to SINAMICS S120 via Sensor Modules.

Built-in encoder systems with DRIVE‑CLiQ interface

For motors with an integrated DRIVE‑CLiQ interface, the analog encoder signal is internally converted to a digital signal. There is no further conversion of the encoder signal in the drive system. The motor-internal encoders are the same encoders that are used for motors without a DRIVE‑CLiQ interface. Motors with a DRIVE‑CLiQ interface simplify the commissioning and diagnostics, for example, due to automatic identification of the encoder system.

The different encoder types, incremental, absolute or resolver, are uniformly connected with one type of MOTION-CONNECT DRIVE‑CLiQ cable.

Short designations for the encoder systems

The first letters of the short designation define the encoder type. This is followed by the resolution in signals per revolution if S/R is specified (for encoders without DRIVE-CLiQ interface) or in bits if DQ is specified (for encoders with DRIVE-CLiQ interface).

Overview of the motor encoder systems

¹⁾ Not for 1FW3 motors.

Not all encoders are available for every motor shaft height.

– Not possible

Multi-turn absolute encoder

Multi-turn absolute encoder

This encoder outputs an absolute angular position between 0° and 360° in the specified resolution. An internal measuring gearbox enables it to differentiate 4096 rotations. With a ball screw, for example, the absolute position of the slide can be determined over a long distance.

Single-turn absolute encoder

This encoder outputs an absolute angular position between 0° and 360° in the specified resolution. In contrast to the multi-turn absolute encoder, it has no measuring gearbox and can therefore only supply the position value within one revolution. It does not have a traversing range.

¹⁾ Not for absolute encoder, single-turn AS.

²⁾ The single-turnabsolute encoder is used for the previous incremental encoders.

Incremental encoder

Incremental encoder IC/IN (sin/cos), commutation position for IC only

This encoder senses relative movements and does not supply absolute position information. In combination with evaluation logic, a zero point can be determined using the integrated reference mark, which can be used in turn to calculate the absolute position.

Incremental encoder IC/IN (sin/cos)

The encoder outputs sine and cosine signals. These can be interpolated using evaluation logic (usually 2048 points) and the direction of rotation can be determined.

In the version with DRIVE‑CLiQ interface, this evaluation logic is already integrated in the encoder.

Commutation position

The position of the rotor is required for commutation of a synchronous motor. Encoders with commutation position (also termed C and D track) detect the angular position of the rotor.

Incremental encoder IC/CN (sin/cos), commutation position only for IC

HTL incremental encoder

HTL incremental encoder

The encoder outputs square wave signals. The direction of rotation can be evaluated by means of edge evaluation.

The resolution is four times the number of encoder pulses. This encoder type is preferred for long signal cables.

HTL incremental encoder

¹⁾ Instead of the IC22DQ incremental encoder, the AS24DQI single-turn absolute encoder is used for SIMOTICS S‑1FK7/1FT7.

Resolver

Resolver

The number of sine and cosine periods per revolution corresponds to the number of pole pairs of the resolver. In the case of a 2‑pole resolver, the evaluation electronics may output an additional zero pulse per encoder revolution. This zero pulse ensures a unique assignment of the position information in relation to an encoder revolution. A 2‑pole resolver can therefore be used as a single-turn encoder.

2‑pole resolvers can be used for motors with any number of pairs of poles. In the case of multi-pole resolvers, the number of pairs of poles of the motor and resolver are always the same. The resolution is correspondingly higher than with 2‑pole resolvers.

¹⁾ Output signals:

2-pole resolver: 1 sin/cos signal per revolution

6-pole resolver: 3 sin/cos signals per revolution

8-pole resolver: 4 sin/cos signals per revolution