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Toshiba: the inverter company
The efficiency of inverter air conditioning is determined by
the efficiency of each component: the control electronics, the
motor, and the compressor. Toshiba has focused its attention on
all of these components.
| The driver of technology
The motor that drives
the revolutions of the air
conditioner is a concentration
of mechanical technology and
electromagnetic engineering.
The most advanced methods
of modelling were used
to determine the best
configuration of the permanent
magnets in the DC motor.
A perfect choice of the
shape and materials for the
permanent magnets allows
for the best synchronisation
with the frequency of the
voltage applied by the control
circuit. The rpm is therefore
precisely selected to match
the ambient conditions. |
Control electronics
Power Factor
The power factor of an electrical
load, such as a motor,
is its power
output compared to the energy
it consumes, both measured in
watts. Ideally, the electrical current
and voltage are “in phase”, and the
power factor is 100%.
Actual operating conditions cause
an inverter system to deviate from
this ideal.
Toshiba has combined two
technologies, creating the “DC
Hybrid Inverter”, that automatically chooses the better of the two
control methods based on the
actual conditions at the time.
This solution provides high
capacity when it is necessary.
On very cold winter days, or
hot summer days the Toshiba
DC Inverter uses the PAM
(Pulse Amplitude Modulation)
method, and for very low energy
consumption, when conditions are
less severe uses the PWM (Pulse
Width Modulation) method.
Given that maximum capacity is
not often required, and that high
efficiency is always desirable, the
result is a greatly reduced annual
energy consumption.
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The twin
rotary
compressor
The compressor is the third
extra-thermodynamic element
which Toshiba has continuously
improved, finally arriving at the
solution called the “DC Twin
Rotary Compressor”. It is a
double cam rotary compressor
which has several features that
increase its performance and
reliability. The opposed, double
blade design yields mechanical
stability and less vibration that
could cause stress on other
components. In fact, being
able to reduce the rpm without
causing instability enables
improved temperature control
when less capacity is required.
An added benefit offered by the
DC Twin Rotary Compressor is
its low noise level compared to
normal rotary compressors, and
with refrigerant R410A, it is more
efficient than scroll compressors. |
The mission?
Improved Indoor
Air Quality
Comfort in the home means much
more than just controlling the
temperature. Because of this,
Toshiba is an excellent investment
for the enhanced well-being of the
family environment.
One of Toshiba’s research objectives
is the continuous introduction of new
ways to eliminate air pollutants in the
residential air conditioning sector. |
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DC Hybrid Inverter
Technology
It’s true: Toshiba was the first
air conditioning manufacturer to
utilise inverter technology within
air conditioning systems in 1981.
Being first to develop and utilise
innovative technology is a passion
for Toshiba.
Inverter technology immediately
demonstrated its advantages:
precisely matching the cooling
or heating requirement, energy
efficiency, and accurate
temperature control.
The development of the DC Hybrid
Inverter has again confirmed this
innovative capability and leadership
position in technology in a fast and
growing air conditioning market.
| The twin
rotary
compressor
The compressor is the third
extra-thermodynamic element
which Toshiba has continuously
improved, finally arriving at the
solution called the “DC Twin
Rotary Compressor”. It is a
double cam rotary compressor
which has several features that
increase its performance and
reliability. The opposed, double
blade design yields mechanical
stability and less vibration that
could cause stress on other
components. In fact, being
able to reduce the rpm without
causing instability enables
improved temperature control
when less capacity is required.
An added benefit offered by the
DC Twin Rotary Compressor is
its low noise level compared to
normal rotary compressors, and
with refrigerant R410A, it is more
efficient than scroll compressors. |
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