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參數(shù)資料
| 型號(hào)： | PWR-82520R3-11O |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 4 A, DMA41 |
| 封裝： | DIP-41 |
| 文件頁(yè)數(shù)： | 10/13頁(yè) |
| 文件大?。?/td> | 163K |
| 代理商： | PWR-82520R3-11O |
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December 6, 1999 Data Device Corporation
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control simplifies the control loop by eliminating the need for
slope compensation and eliminating the pole created by the
motor inductance. These two effects are normally associated
with 50% duty cycle limitations when implementing standard
peak current mode control.
VBUS
PHASE A
UPPER
PHASE A
LOWER
PHASE B
UPPER
PHASE B
LOWER
Rsense
PHASE A
PHASE B
PHASE C
-
+
OFF
ON
I
VBUS
PHASE A
UPPER
PHASE A
LOWER
PHASE B
UPPER
PHASE B
LOWER
Rsense
PHASE A
PHASE B
PHASE C
+
_
OFF
I
Flyback
FIGURE 3A. STANDARD 4 QUANDRANT DRIVE FIRST
HALF OF PWM CYCLE
FIGURE 3B. STANDARD 4 QUANDRANT DRIVE SECOND
HALF OF PWM CYCLE
FUNCTIONAL AND
PIN DESCRIPTIONS:
COMMAND IN+, COMMAND IN-
The command amplifier has a differential input that operates
from a ±4Vdc full-scale analog current command. The command
signal is internally limited to approximately ±5Vdc to prevent the
amplifier from saturation. The input impedance of the command
amplifier is 10K Ohms.
The (PWR-82520X) can be used either as a current or voltage
mode controller. When used as a torque controller (current
mode), the input command signal is processed through the com-
mand buffer, which is internally limited to a ±5Vdc. The output of
the buffer (command out) is summed with the current monitor
output into the error amplifier. External compensation is used on
the error amp, so the response time can be adjusted to meet the
application.
When used in the voltage mode, the voltage command uses the
same differential input terminals to control the voltage applied to
the motor. The error amp directly varies the PWM duty cycle of
the voltage applied to the motor phase. The transfer function in
the voltage mode is 4.7%V/±5% variation of the PWM duty cycle
vs. input command. The duty cycle range of the output voltage is
limited to approximately 5-95% in both current and voltage
modes.
TRANSCONDUCTANCE RATIO and OFFSET
When the PWR-82520X is used in the current mode, the com-
mand inputs (COMMAND IN+ and COMMAND IN-) are designed
such that ±4Vdc on either input, with the other input connected
to Ground will result in ± full scale current into the load. The dc
current transfer ratio accuracy is ±5% of the rated current includ-
ing offset and initial component accuracy. The initial output dc
current offset with both COMMAND IN+ and COMMAND IN- tied
to the Ground will be as shown in TABLE 2 when measured
using a load of 0.5mH and 1.0
at room ambient with standard
current loop compensation. The winding phase current error
shall be within the cumulative limits of the transconductance ratio
error and the offset error.
HALL A, B, C SIGNALS
These are logic signals from the motor Hall-effect sensors. They
use a phasing convention referred to as 120 degree spacing; that
is, the output of HA is in phase with motor back EMF voltage
VAB, HB is in phase VBC, and HC is in phase with VCA. Logic
“1” (or HIGH ) is defined by an input greater than 2.4Vdc or an
open circuit to the controller; Logic “0”(or LOW) is defined as any
Hall voltage input less than 0.8Vdc. Internal to the PWR-82520X
are 10K pull-up resistors tied to +5Vdc on each Hall input.
The PWR-82520X will operate with Hall phasing of 60° or 120°
electrical spacing. If 60° commutation is used, then the output of
HC must be inverted as shown in FIGURES 4 and 5. In FIGURE
4 the Hall sensor outputs are shown with the corresponding back
emf voltage they are in phase with.
Hall Input Signal Conditioning: When the motor is located
more than two feet away from the PWR-82520X controller the
Hall inputs require filtering from noise. It is recommended to use
a 1K
resistor in series with the Hall signal and a 2000 pF
capacitor from the Hall input pin to the Hall supply ground pin as
shown in FIGURE 11 and 12.
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| PWR-82520R1-10O | BRUSHLESS DC MOTOR CONTROLLER, 1.5 A, DMA41 |
| PWR-82520R3-30O | BRUSHLESS DC MOTOR CONTROLLER, 4 A, DMA41 |
| PWR-82520R10-10O | BRUSHLESS DC MOTOR CONTROLLER, 14 A, DFM43 |
相關(guān)代理商/技術(shù)參數(shù) |
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