
Glentek Inc., 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322
Chapter One: Description, Features and Specifications
1.1 Description:
This brushless amplifier system has been designed to offer you, our customer, a large degree of flexibility and
customization with a standard, in stock product. Each amplifier module consists of a standard power output board
with one of our three types of personality modules mounted on it. (To help you understand the various brushless
amplifier and motor system combinations and their respective advantages and disadvantages, please refer to chapter
two of this manual which describes the theory of operation). Following is a brief description of these three personality
modules and their mode(s) of operation:
Trapezoidal Mode (SMA8115/SMA8115HP) -In this mode of operation, which is also commonly referred to
as six step, the brushless motor is commutated by hall sensors or an encoder which contains these
commutation signals. This personality module can be configured for the following three different types of
operation:
VELOCITY MODE -In this mode of operation, a velocity signal from a brushless or brush type
tachometer is used to close a velocity loop in the amplifier. Please see section 2.3, 2.7, 2.8 of this
manual for more detailed information.
SIMULATED VELOCITY MODE -In this mode of operation, a circuit on the personality module looks at
the hall sensors and generates a simulated velocity signal which is used to close a velocity loop in the
amplifier. This mode of operation offers an extremely cost effective velocity mode system for medium to
high velocity applications. Please see section 2.6 of this manual for more detailed information.
CURRENT MODE -In this mode of operation, which is also commonly referred to as torque mode, a
current in the motor is produced which is directly proportional to the input signal. Please see section 2.2,
2.5, 2.7 of this manual for more detailed information.
Sine/Resolver Mode (SMA8215/SMA8215HP) -In this mode of operation, a brushless motor with an integral
resolver is required. The personality module contains a resolver to digital converter which provides the
positional information to the amplifier that is required to commutate the motor. This positional information is
also used by the personality module to emulate a quadrature encoder output. This personality module can be
configured for the following two different types of operation:
VELOCITY MODE -In this mode of operation, the personality module generates a tachometer signal
which is used to close a velocity loop in the amplifier. Please see section 2.3, 2.5, 2.8 of this manual for
more detailed information.
CURRENT MODE -In this mode of operation, which is also commonly referred to as torque mode, sine
wave currents in the motor are produced that are directly proportional to the input signal. Please see
section 2.5, 2.7, 2.9 of this manual for more detailed information.
Two/Three Phase Input Current Mode (SMA8315/SMA8315HP) -In the two phase current mode, the
amplifier generates three sine wave currents that are proportional to two input signals. This third command is
generated on the personality module as the negative sum of the other two signals. In the three phase current
mode, the amplifier generates three sine wave currents that are proportional to three input signals. Please
see section 2.5, 2.9 of this manual for more detailed information.
These brushless amplifiers come with all industry standard inputs such as +/-limit, fault output, etc. They are
available in the following types of configurations:
As amplifier modules where you supply the DC Buss voltage, cooling fan(s), fusing and shunt regulator.
Please see section 1.2.1 for more detailed information.
For multi-axis applications, the multi-axis baseplate power supply can supply
DC power, cooling fans, zero crossing solid state relays, fusing and a shunt
regulator for up to 4axis or 60 amperes continuous. Please see section 1.2.3 for
more detailed information.
CHAPTER 1: DESCRIPTION, FEATURES AND SPECIFICATIONS