TITAN GO Product Manual |
Product Description
INGENIA | 2022-07-14 08:35:14
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The following figure shows the basic power flow and losses in a servo drive system.
4.3.1 Power losses calculation (heat dissipation)
Current flowing through Titan Servo Drive causes power losses that, ultimately, are converted in heat. This heat
must be transferred to its surrounding environment efficiently so that the temperature of the drive does not reach
dangerous levels. The greater the power losses, the more effective the heat dissipation must be. Power losses
mainly depend mainly on 3 parameters:
Motor RMS current
: this is the cause of what is called
static
or
conduction
power losses, which typically are
the main source of power losses, having that they show a positive correlation in a squared ratio.
DC bus voltage
: this, along with the motor RMS current and PWM switching frequency, is the cause of what
are called
dynamic
or
commutation
losses, and show positive correlation in a proportional ratio.
PWM switching frequency:
similar to DC bus voltage, the PWM switching frequency directly affects the
commutation losses. Typically, 10 kHz is the default value to reduce these losses, but it can be increased up
to 20 kHz.
Other less relevant parameters affect also the power losses but are not considered in the following graphs:
Air temperature: higher power semiconductor temperatures reduce their efficiency.
Motor speed: faster motor speeds result in higher overall power losses since the input DC bus current is
greater, and this increases conduction losses on the reverse polarity protection circuitry.
Some parts of the Titan Go can exceed 125 ºC during operation, especially at high load levels.
Do not touch the Titan Go during operation
and wait at least 5 minutes after turn off to allow a safe cool
down.
PWM switching frequency and nominal specifications
All nominal specifications in this manual are measured under a PWM switching frequency of 10 kHz.
PWM in SMO feedback mode
It is strongly recommended to configure the alternative PWM frequency of 20 kHz when using the
sensorless SMO as a feedback source, or when controlling motors of low inductance.
Summary of Contents for Titan GO
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Page 56: ...TITAN GO Product Manual Wiring and Connections INGENIA 2022 07 14 08 35 14 56 ...
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